cp's OEIS Frontend

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.

A065892 Which composite number is n! ?: a(n) = k such that A002808(k) = n!, or 0 if n! is not composite.

Table of values

n a(n)
1 0
2 0
3 2
4 14
5 89
6 591
7 4364
8 36088
9 331910
10 3370110
11 37487843
12 453695312
13 5937400048
14 83567800394
15 1258987455069
16 20216786089860
17 344733810100259
18 6221338673520239
19 118470005905053478
20 2374008406467087461
21 49939116469530531211
22 1100312192659475223331
23 25340966583568917929966

List of values

[0, 0, 2, 14, 89, 591, 4364, 36088, 331910, 3370110, 37487843, 453695312, 5937400048, 83567800394, 1258987455069, 20216786089860, 344733810100259, 6221338673520239, 118470005905053478, 2374008406467087461, 49939116469530531211, 1100312192659475223331, 25340966583568917929966]

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

Content is available under The OEIS End-User License Agreement.