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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.

A346765 a(n) = Sum_{k=0..n} Stirling2(n,k) * binomial(4*k,k) / (3*k + 1).

Table of values

n a(n)
0 1
1 1
2 5
3 35
4 301
5 2980
6 32824
7 394119
8 5089387
9 70008606
10 1018551386
11 15586572831
12 249761256325
13 4175639393112
14 72613795311014
15 1310044170067051
16 24465311302401475
17 472024733580022982
18 9392470260695334398
19 192455730876780393835
20 4055291189439769281557

List of values

[1, 1, 5, 35, 301, 2980, 32824, 394119, 5089387, 70008606, 1018551386, 15586572831, 249761256325, 4175639393112, 72613795311014, 1310044170067051, 24465311302401475, 472024733580022982, 9392470260695334398, 192455730876780393835, 4055291189439769281557]

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

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