GET /search

oeis.org:oeis-api

Summary: Search for sequences
Operation ID: searchSequences
Auth: unknown
Description

Search the OEIS database for integer sequences matching the query. Returns an array of sequence objects or null if no results found.

Parameters (3)

fmt (string, query, optional, default: json)

Response format

Constraints: {'enum': ['json', 'text']}

q (string, query, required)

Search query. Can be sequence terms (e.g., '1,2,3,5,8'), sequence ID (e.g., 'A000045'), keywords, or author name.

start (integer, query, optional, default: 0)

Starting index for pagination (0-based)

Constraints: {'minimum': 0}

Examples (6)

TitleTypeURLAction
Search for integer sequences openapi-spec https://oeis.org/search?q=id:A000045&fmt=json&start=0
Search sequences openapi-spec https://oeis.org/search?q=1,1,2,3,5,8
Search integer sequences openapi-spec https://oeis.org/search?q=A000045&fmt=json
Search integer sequences probe-gate https://oeis.org/search?q=A000045&fmt=json&start=0&count=10
Search for sequences openapi-spec https://oeis.org/search?q=fibonacci
Search for sequences probe-gate https://oeis.org/search?q=fibonacci&fmt=json&start=0

Probe History

Latency

Status Codes

TimeStatusLatencySize
2026-03-23 10:44:06.278886 200 527ms
2026-03-23 10:42:56.695052 200 1603ms
2026-03-23 10:32:27.398468 200 2682ms
2026-03-23 09:27:36.382657 200 500ms
2026-03-23 09:26:12.717380 200 260ms
2026-03-23 09:08:38.765174 200 295ms

Response Changes

WhenOldNew
2026-03-23 09:26:12.717380 c184622c497d e9119969d90b
2026-03-23 09:27:36.382657 e9119969d90b 206f4ba0eab0
2026-03-23 10:32:27.398468 206f4ba0eab0 15ef55633120
2026-03-23 10:42:56.695052 15ef55633120 b2cdcda0afc0