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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A065424 Catalan-like formula: a(n) = binomial(6*n, 3*n+1)/(9*n+6).

Table of values

n a(n)
1 1
2 33
3 1326
4 59432
5 2851425
6 143291610
7 7446255180
8 396893583792
9 21579377870484
10 1192183281903845
11 66734212415276406
12 3776778437640143208
13 215744630060724034270
14 12423227699242323077940
15 720356761939547257421400
16 42024927437494196952957408
17 2464931252806478840545733484

List of values

[1, 33, 1326, 59432, 2851425, 143291610, 7446255180, 396893583792, 21579377870484, 1192183281903845, 66734212415276406, 3776778437640143208, 215744630060724034270, 12423227699242323077940, 720356761939547257421400, 42024927437494196952957408, 2464931252806478840545733484]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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