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.

A357711 Expansion of e.g.f. cosh( 2 * log(1-x) ).

Table of values

n a(n)
0 1
1 0
2 4
3 12
4 60
5 360
6 2520
7 20160
8 181440
9 1814400
10 19958400
11 239500800
12 3113510400
13 43589145600
14 653837184000
15 10461394944000
16 177843714048000
17 3201186852864000
18 60822550204416000
19 1216451004088320000
20 25545471085854720000
21 562000363888803840000

List of values

[1, 0, 4, 12, 60, 360, 2520, 20160, 181440, 1814400, 19958400, 239500800, 3113510400, 43589145600, 653837184000, 10461394944000, 177843714048000, 3201186852864000, 60822550204416000, 1216451004088320000, 25545471085854720000, 562000363888803840000]

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

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