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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.

A357193 a(n) = n! * Sum_{k=0..floor(n/2)} k^(2*n)/k!.

Table of values

n a(n)
0 1
1 0
2 2
3 6
4 3096
5 61560
6 65248200
7 4058986680
8 7506140268480
9 1062517243193280
10 3052268000677879200
11 822543740977513816800
12 3395913346775619237617280
13 1553795963458841732838848640
14 8727392877498334693600263757440

List of values

[1, 0, 2, 6, 3096, 61560, 65248200, 4058986680, 7506140268480, 1062517243193280, 3052268000677879200, 822543740977513816800, 3395913346775619237617280, 1553795963458841732838848640, 8727392877498334693600263757440]

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

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