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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.

A336228 a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n,k)^2 * (n-k) * a(k).

Table of values

n a(n)
0 1
1 1
2 6
3 75
4 1684
5 59005
6 2977566
7 204512875
8 18346977608
9 2083115635065
10 291996210173410
11 49525220811387871
12 9996609976117991436
13 2368117724291275331869
14 650613686811158069472942
15 205196311013650099853516115
16 73633144885479474283911225616

List of values

[1, 1, 6, 75, 1684, 59005, 2977566, 204512875, 18346977608, 2083115635065, 291996210173410, 49525220811387871, 9996609976117991436, 2368117724291275331869, 650613686811158069472942, 205196311013650099853516115, 73633144885479474283911225616]

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

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