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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.

A385981 a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+4,4) * binomial(n-1,k) * a(k) * a(n-1-k).

Table of values

n a(n)
0 1
1 1
2 11
3 526
4 75981
5 27017601
6 20599793857
7 30432196412318
8 80590529100023889
9 359767027014797719000
10 2575966649397129017224661
11 28392489655027195386265889544
12 465411261102140455922541427819489
13 11017701081052339904298545720453122836
14 367264434033142995461894471693185212854475

List of values

[1, 1, 11, 526, 75981, 27017601, 20599793857, 30432196412318, 80590529100023889, 359767027014797719000, 2575966649397129017224661, 28392489655027195386265889544, 465411261102140455922541427819489, 11017701081052339904298545720453122836, 367264434033142995461894471693185212854475]

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

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