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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.

A385877 a(n) = 1 + Sum_{k=0..n-1} binomial(k+4,5) * a(k) * a(n-1-k).

Table of values

n a(n)
0 1
1 1
2 2
3 14
4 309
5 17637
6 2240632
7 566921596
8 262489646519
9 208155482551991
10 268104800528280951
11 537014337938584568385
12 1613191612128443060280697
13 7048035233444754041436840277
14 43620293298146615746333469478901
15 373782307403691698916363133787269075

List of values

[1, 1, 2, 14, 309, 17637, 2240632, 566921596, 262489646519, 208155482551991, 268104800528280951, 537014337938584568385, 1613191612128443060280697, 7048035233444754041436840277, 43620293298146615746333469478901, 373782307403691698916363133787269075]

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

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