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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.

A381449 Expansion of e.g.f. (1/x) * Series_Reversion( x/(1 + x * cosh(x))^2 ).

Table of values

n a(n)
0 1
1 2
2 10
3 90
4 1224
5 22450
6 517920
7 14395514
8 468414464
9 17474840226
10 735559614720
11 34491849224602
12 1783268816102400
13 100786369113730898
14 6182264844496971776
15 409065938149354422330
16 29043282491002728284160
17 2202461172795524123296834
18 177675452451923238962528256

List of values

[1, 2, 10, 90, 1224, 22450, 517920, 14395514, 468414464, 17474840226, 735559614720, 34491849224602, 1783268816102400, 100786369113730898, 6182264844496971776, 409065938149354422330, 29043282491002728284160, 2202461172795524123296834, 177675452451923238962528256]

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

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