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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.

A331512 a(n) = Sum_{k=0..n} n^(n-k) * (n+k+1) * binomial(n,k) * binomial(n+k,k).

Table of values

n a(n)
0 1
1 8
2 90
3 1328
4 24150
5 520272
6 12926004
7 363233600
8 11376760230
9 392615960600
10 14791582824876
11 603743206301424
12 26528443526357500
13 1248071683342913184
14 62576263671773466600
15 3330116426356595493120
16 187430800395881065513734

List of values

[1, 8, 90, 1328, 24150, 520272, 12926004, 363233600, 11376760230, 392615960600, 14791582824876, 603743206301424, 26528443526357500, 1248071683342913184, 62576263671773466600, 3330116426356595493120, 187430800395881065513734]

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

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