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.

A082491 a(n) = n! * d(n), where n! = factorial numbers (A000142), d(n) = subfactorial numbers (A000166).

Table of values

n a(n)
0 1
1 0
2 2
3 12
4 216
5 5280
6 190800
7 9344160
8 598066560
9 48443028480
10 4844306476800
11 586161043776000
12 84407190782745600
13 14264815236056985600
14 2795903786354347468800
15 629078351928420506112000
16 161044058093696572354560000
17 46541732789077953723039744000

List of values

[1, 0, 2, 12, 216, 5280, 190800, 9344160, 598066560, 48443028480, 4844306476800, 586161043776000, 84407190782745600, 14264815236056985600, 2795903786354347468800, 629078351928420506112000, 161044058093696572354560000, 46541732789077953723039744000]

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

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