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.

A171005 a(n) = (n+1)*(n-1)!/2.

Table of values

n a(n)
3 4
4 15
5 72
6 420
7 2880
8 22680
9 201600
10 1995840
11 21772800
12 259459200
13 3353011200
14 46702656000
15 697426329600
16 11115232128000
17 188305108992000
18 3379030566912000
19 64023737057280000
20 1277273554292736000
21 26761922089943040000
22 587545834974658560000
23 13488008733331292160000

List of values

[4, 15, 72, 420, 2880, 22680, 201600, 1995840, 21772800, 259459200, 3353011200, 46702656000, 697426329600, 11115232128000, 188305108992000, 3379030566912000, 64023737057280000, 1277273554292736000, 26761922089943040000, 587545834974658560000, 13488008733331292160000]

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

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