🔢 OEIS Integer Sequences Scraper

🚀 Export integer sequences from the OEIS in seconds. Search 370,000+ sequences by A-number, keyword, or matching terms. Pull terms, formulas, references, authors, cross-references, and program code (Maple, Mathematica, Python, more).

🕒 Last updated: 2026-05-22 · 📊 22 fields per record · 🔢 370,000+ sequences · 🧠 OEIS Foundation source · 💻 Multi-language programs

The OEIS Integer Sequences Scraper taps the Online Encyclopedia of Integer Sequences, the canonical reference for integer sequences in mathematics. Maintained since 1964 by Neil Sloane and the OEIS Foundation, the database now indexes more than 370,000 sequences, each curated with terms, formulas, generating functions, references, code, and cross-links.

This Actor returns 22 structured fields per record, including the A-number, name, full numeric data, term array, offset, keywords, author, creation and revision dates, comments, references, links, formulas, examples, Maple and Mathematica snippets, multi-language program code, and cross-references to related sequences.

🎯 Target Audience	💡 Primary Use Cases
Mathematicians, ML feature engineers, programmers, combinatorialists, recreational math fans, educators, puzzle designers	Pattern recognition, sequence identification, code generation reference, OEIS-grounded LLM features, ML training data, problem-set curation

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📋 What the OEIS Integer Sequences Scraper does

Flexible OEIS search syntax in a single Actor:

• 🔢 A-number lookup. id:A000045 returns Fibonacci.
• 📛 Keyword search. fibonacci, prime, partition, permutation.
• 🧮 Match by terms. Paste a comma-separated sequence (1,1,2,3,5,8) and OEIS finds matching entries.
• 🏷️ Filter by keywords. Combine with OEIS-curated tags like core, easy, nice, tabl, nonn.
• 🧑‍🔬 Author filter. author:Sloane narrows to entries by a specific contributor.

Each record includes the A-number, sequence values (string and parsed array), offset, OEIS keywords, author byline, creation and revision dates, prose comments, bibliographic references, hyperlinks, mathematical formulas, worked examples, Maple/Mathematica/program code, and cross-references to related A-numbers.

💡 Why it matters: OEIS is the de facto authority for "what sequence is this?" Building your own client means crawling HTML, parsing free-text fields, and handling Sloane's idiosyncratic flat-file format. This Actor delivers a tidy schema with terms already parsed into an array.

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🎬 Full Demo

🚧 Coming soon: a 3-minute walkthrough showing how to go from sign-up to a downloaded dataset.

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⚙️ Input

Input	Type	Default	Behavior
maxItems	integer	10	Records to return. Free plan caps at 10, paid plan at 1,000,000.
searchQuery	string	"fibonacci"	Native OEIS search syntax (A-number, keyword, terms, or combined query).
keywords	string[]	[]	Optional list of OEIS keyword filters (intersected with searchQuery).

Example: pull the Fibonacci sequence by A-number.

{
    "maxItems": 1,
    "searchQuery": "id:A000045"
}

Example: find essential ("core") sequences related to primes.

{
    "maxItems": 20,
    "searchQuery": "prime",
    "keywords": ["core", "nice"]
}

Example: identify a mystery sequence by matching terms.

{
    "maxItems": 5,
    "searchQuery": "1,1,2,3,5,8,13,21"
}

⚠️ Good to Know: OEIS search returns results in paginated batches. The Actor paginates automatically and respects polite request pacing so you avoid being rate-limited.

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📊 Output

Each record contains 22 fields. Download the dataset as CSV, Excel, JSON, or XML.

🧾 Schema

Field	Type	Example
🆔 aNumber	string	"A000045"
🔢 number	integer	45
🏷️ name	string	"Fibonacci numbers: F(n) = F(n-1) + F(n-2)..."
🧾 data	string	"0,1,1,2,3,5,8,13,21,34,55,89,144,..."
📊 terms	number[]	[0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
📐 offset	string | null	"0,3"
🏷️ keywords	string[] | null	["core", "nonn", "easy", "nice"]
👤 author	string | null	"N. J. A. Sloane"
🕒 createdDate	ISO 8601 | null	"1991-05-19T00:00:00.000Z"
🕓 revisedDate	ISO 8601 | null	"2026-05-20T00:00:00.000Z"
💬 comment	string[] | null	["F(n+2) = F(n+1) + F(n).", ...]
📚 reference	string[] | null	["Knuth, TAOCP Vol. 1, ...", ...]
🔗 link	string[] | null	["https://oeis.org/A000045/b000045.txt", ...]
➕ formula	string[] | null	["F(n) = (phi^n - (-phi)^(-n))/sqrt(5).", ...]
🧮 example	string[] | null	["F(5) = 5.", ...]
🟣 maple	string[] | null	["A000045 := proc(n) ... end:"]
🟠 mathematica	string[] | null	["Table[Fibonacci[n], {n, 0, 30}]"]
💻 program	string[] | null	["(Python) def fib(n): ...", "(Haskell) ..."]
🔗 xref	string[] | null	["A000032", "A001690", ...]
🌐 url	string	"https://oeis.org/A000045"
🕓 scrapedAt	ISO 8601	"2026-05-22T00:00:00.000Z"
⚠️ error	string | null	null

📦 Sample records

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✨ Why choose this Actor

	Capability
🔢	370,000+ sequences. The complete, continuously updated OEIS catalog.
🧮	Multi-mode search. A-number, keyword, matching terms, author, OEIS keyword filters.
📊	Parsed term arrays. Numeric terms[] ready for analysis, alongside raw data string.
💻	Multi-language code. Maple, Mathematica, Python, Haskell, PARI/GP, Sage, and more.
🔗	Cross-references. Every entry links to related sequences via xref.
⚡	Fast. 100 sequences in under a minute.
🔁	Always fresh. Every run hits the live OEIS feed.

📊 OEIS is the canonical reference for integer sequences and is cited by mathematicians, programmers, and AI researchers worldwide.

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📈 How it compares to alternatives

Approach	Cost	Coverage	Refresh	Filters	Setup
⭐ OEIS Integer Sequences Scraper (this Actor)	$5 free credit, then pay-per-use	370,000+ sequences	Live per run	A-number, keyword, terms, OEIS tags	⚡ 2 min
Manual OEIS website browsing	Free	Per-query	Manual	Web form	🐢 Hours
Hand-coded OEIS client	Free	Full	Per-build	Custom	⏳ Days
Static OEIS data dump	Free	Snapshot	Periodic	None	🕒 Variable

Pick this Actor when you want live search, parsed terms, and zero parser work.

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🚀 How to use

1. 📝 Sign up. Create a free account with $5 credit (takes 2 minutes).
2. 🌐 Open the Actor. Go to the OEIS Integer Sequences Scraper page on the Apify Store.
3. 🎯 Set input. Enter an A-number, keyword, or term list and optional keyword filters.
4. 🚀 Run it. Click Start and let the Actor collect your data.
5. 📥 Download. Grab your results in the Dataset tab as CSV, Excel, JSON, or XML.

⏱️ Total time from signup to downloaded dataset: 3-5 minutes. No coding required.

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💼 Business use cases

🧠 ML and AI feature engineering Generate training data for sequence-prediction models Build benchmarks for mathematical reasoning LLMs Ground retrieval-augmented systems with OEIS records Test code-generation models against curated programs	🔢 Mathematics and research Identify mystery sequences from partial terms Discover related sequences via cross-references Pull formulas and references for papers Curate problem sets for teaching combinatorics
💻 Programming and tooling Build "what is this sequence?" developer tools Generate code-completion snippets from OEIS programs Power competitive-programming hint engines Seed unit tests with canonical sequences	🎓 Education Build interactive math lessons around OEIS examples Curate sequence-pattern puzzles for students Source historical context from author attributions Cross-language code teaching with Maple/Mathematica/Python

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🔌 Automating OEIS Integer Sequences Scraper

Control the scraper programmatically for scheduled runs and pipeline integrations:

• 🟢 Node.js. Install the apify-client NPM package.
• 🐍 Python. Use the apify-client PyPI package.
• 📚 See the Apify API documentation for full details.

The Apify Schedules feature lets you trigger this Actor on any cron interval. Weekly refreshes keep downstream search indices in sync automatically.

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🌟 Beyond business use cases

Data like this powers more than commercial workflows. The same structured records support research, education, civic projects, and personal initiatives.

🎓 Research and academia Thesis projects in combinatorics and number theory Reproducible math papers with cited OEIS pulls Course datasets for discrete-math and algorithms classes Open-science notebooks grounded in OEIS records	🎨 Personal and creative Hobbyist math blogs and YouTube explainers Visualization projects on sequence behavior Puzzle and recreational-math content Generative art driven by integer sequences
🤝 Non-profit and civic Open educational resources for under-served schools Math-olympiad training material curation Public-interest visualizations of numerical patterns Citizen-math outreach and clubs	🧪 Experimentation Train sequence-completion ML models Benchmark LLMs on math reasoning with OEIS labels Prototype agent pipelines that identify sequences Build LLM-grounded math assistants with cited entries

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🤖 Ask an AI assistant about this scraper

Open a ready-to-send prompt about this ParseForge actor in the AI of your choice:

• 💬 ChatGPT
• 🧠 Claude
• 🔍 Perplexity
• 🅒 Copilot

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❓ Frequently Asked Questions

🧩 How does it work?

Enter a search query using native OEIS syntax (A-number, keyword, comma-separated terms, or a combined expression), optionally add keyword filters, and click Start. The Actor paginates results and emits one structured record per sequence.

📏 How accurate is the data?

Records mirror the live OEIS feed. OEIS is curated by Neil Sloane and a global volunteer editorial board, with every change peer-reviewed before publication.

🔁 How often is the dataset refreshed?

OEIS is updated daily as editors approve new sequences and revisions. Every Actor run reflects the current OEIS state.

🔍 Can I identify a sequence from just a few terms?

Yes. Paste the terms as a comma-separated query (e.g. 1,1,2,3,5,8) and OEIS returns matching sequences ranked by relevance.

⏰ Can I schedule regular runs?

Yes. Use Apify Schedules to run this Actor on any cron interval and keep a downstream search index in sync.

⚖️ Is this data legal to use?

OEIS publishes under a Creative Commons license. Review the specific CC terms for the sequences you use, but most reuse is permitted with attribution.

💼 Can I use this data commercially?

Generally yes, subject to the OEIS Creative Commons license. Attribute the OEIS Foundation when you redistribute or build derivative works.

💳 Do I need a paid Apify plan to use this Actor?

No. The free Apify plan is enough for testing and small runs (10 records per run). A paid plan lifts the limit and gives you access to scheduling, higher concurrency, and larger datasets.

🔁 What happens if a run fails or gets interrupted?

Apify automatically retries transient errors. If a run still fails, you can inspect the log in the Runs tab, fix the input, and re-run. Partial datasets from failed runs are preserved so you never lose progress.

🆘 What if I need help?

Our support team is here to help. Contact us through the Apify platform or use the Tally form linked below.

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🔌 Integrate with any app

OEIS Integer Sequences Scraper connects to any cloud service via Apify integrations:

• Make - Automate multi-step workflows
• Zapier - Connect with 5,000+ apps
• Slack - Get run notifications in your channels
• Airbyte - Pipe sequence data into your warehouse
• GitHub - Trigger runs from commits and releases
• Google Drive - Export datasets straight to Sheets

You can also use webhooks to trigger downstream actions when a run finishes. Push fresh OEIS records into your product backend, or alert your team in Slack.

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• 🌐 OSF Scraper - Open Science Framework registry

💡 Pro Tip: browse the complete ParseForge collection for more reference-data scrapers.

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🆘 Need Help? Open our contact form to request a new scraper, propose a custom data project, or report an issue.

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⚠️ Disclaimer: this Actor is an independent tool and is not affiliated with, endorsed by, or sponsored by the OEIS Foundation, Neil Sloane, or any editorial board member. All trademarks mentioned are the property of their respective owners. Only publicly available open data is collected.