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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.

A385750 a(n) = Sum_{k=0..n} Stirling2(n,k) * (n!/k!)^2.

Table of values

n a(n)
0 1
1 1
2 5
3 64
4 1681
5 78651
6 5891041
7 653545390
8 101785047169
9 21431911982437
10 5927319770834701
11 2101574777340578156
12 935265924020629176625
13 512945332353359967175999
14 341342159773993944429746793
15 272012935493149854994361194426
16 256689188247205271953044107166721
17 284051735653584424779666013789038985

List of values

[1, 1, 5, 64, 1681, 78651, 5891041, 653545390, 101785047169, 21431911982437, 5927319770834701, 2101574777340578156, 935265924020629176625, 512945332353359967175999, 341342159773993944429746793, 272012935493149854994361194426, 256689188247205271953044107166721, 284051735653584424779666013789038985]

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

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