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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.

A336241 a(n) = (n!)^2 * Sum_{d|n} 1 / (d!)^2.

Table of values

n a(n)
1 1
2 5
3 37
4 721
5 14401
6 662401
7 25401601
8 2034950401
9 135339724801
10 16461151257601
11 1593350922240001
12 293575350020198401
13 38775788043632640001
14 9500068369885892198401
15 1757631343928533032960001
16 547963926586675321282560001
17 126513546505547170185216000001

List of values

[1, 5, 37, 721, 14401, 662401, 25401601, 2034950401, 135339724801, 16461151257601, 1593350922240001, 293575350020198401, 38775788043632640001, 9500068369885892198401, 1757631343928533032960001, 547963926586675321282560001, 126513546505547170185216000001]

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

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