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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.

A337554 a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k) * (5*k-4) * a(n-k).

Table of values

n a(n)
0 1
1 1
2 8
3 53
4 560
5 6961
6 105898
7 1867393
8 37713620
9 856269401
10 21606253238
11 599664843433
12 18156702186880
13 595557844417441
14 21037627605306578
15 796218790808110673
16 32143778726932363340
17 1378765268603813275081
18 62619174356163136219918
19 3001963660666272082265113

List of values

[1, 1, 8, 53, 560, 6961, 105898, 1867393, 37713620, 856269401, 21606253238, 599664843433, 18156702186880, 595557844417441, 21037627605306578, 796218790808110673, 32143778726932363340, 1378765268603813275081, 62619174356163136219918, 3001963660666272082265113]

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

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