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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.

A367521 a(n) = binomial(A007310(n+1),n+1)/A007310(n+1).

Table of values

n a(n)
0 1
1 2
2 5
3 30
4 99
5 728
6 2652
7 21318
8 81719
9 690690
10 2731365
11 23841480
12 96282900
13 859515920
14 3524015272
15 31983672534
16 132638171391
17 1219199353190
18 5101386767295
19 47365474641870
20 199611643133595
21 1868545312633440
22 7921007303554800
23 74650344244967400

List of values

[1, 2, 5, 30, 99, 728, 2652, 21318, 81719, 690690, 2731365, 23841480, 96282900, 859515920, 3524015272, 31983672534, 132638171391, 1219199353190, 5101386767295, 47365474641870, 199611643133595, 1868545312633440, 7921007303554800, 74650344244967400]

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

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