{"resource":"https://combinatorics.openverbs.com/v1/catalan","service":"Catalan number","areas":["other"],"answering":true,"http_status":402,"latency_ms":391,"price_usdc":0.004,"buyers_30d":3,"calls_30d":3,"description":"The n-th Catalan number Cₙ = C(2n, n)/(n+1), counting balanced bracketings, binary trees, and many other structures. Requires n ≤ 10000.","id":"0e1fc60f2af5","category":"Unclassified","accuracy":null,"tool_calls":null,"checked_day":"2026-10-11","page":"https://velliumandco.com/sellers/0e1fc60f2af5"}