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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.

A243657 Zeroless factorials: a(0)=1; thereafter a(n) = noz(n*a(n-1)), where noz(n) = A004719(n) omits the zeros from n.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 12
6 72
7 54
8 432
9 3888
10 3888
11 42768
12 513216
13 667188
14 934632
15 141948
16 2271168
17 3869856
18 6965748
19 132349212
20 264698424
21 555866694
22 1222967268
23 28128247164
24 67577931936
25 16894482984
26 439256557584
27 1185992754768
28 332779713354
29 965611687266
30 289683561798
31 89819415738

List of values

[1, 1, 2, 6, 24, 12, 72, 54, 432, 3888, 3888, 42768, 513216, 667188, 934632, 141948, 2271168, 3869856, 6965748, 132349212, 264698424, 555866694, 1222967268, 28128247164, 67577931936, 16894482984, 439256557584, 1185992754768, 332779713354, 965611687266, 289683561798, 89819415738]

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

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