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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.

A107863 Column 1 of triangle A107862; a(n) = binomial(n*(n+1)/2 + n, n).

Table of values

n a(n)
0 1
1 2
2 10
3 84
4 1001
5 15504
6 296010
7 6724520
8 177232627
9 5317936260
10 179013799328
11 6681687099710
12 273897571557780
13 12233149001721760
14 591315394579074378
15 30756373941461374800
16 1712879663609111933495
17 101696990867999141755140

List of values

[1, 2, 10, 84, 1001, 15504, 296010, 6724520, 177232627, 5317936260, 179013799328, 6681687099710, 273897571557780, 12233149001721760, 591315394579074378, 30756373941461374800, 1712879663609111933495, 101696990867999141755140]

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

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