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.

A213168 a(n) = n!/2 - (n-1)! - n + 2.

Table of values

n a(n)
2 0
3 0
4 4
5 33
6 236
7 1795
8 15114
9 141113
10 1451512
11 16329591
12 199583990
13 2634508789
14 37362124788
15 566658892787
16 9153720575986
17 156920924159985
18 2845499424767984
19 54420176498687983
20 1094805903679487982
21 23112569077678079981
22 510909421717094399980

List of values

[0, 0, 4, 33, 236, 1795, 15114, 141113, 1451512, 16329591, 199583990, 2634508789, 37362124788, 566658892787, 9153720575986, 156920924159985, 2845499424767984, 54420176498687983, 1094805903679487982, 23112569077678079981, 510909421717094399980]

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

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