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.

A381521 Expansion of e.g.f. (1/x) * Series_Reversion( x/(1 + x * cos(x))^2 ).

Table of values

n a(n)
0 1
1 2
2 10
3 78
4 792
5 9250
6 106080
7 636286
8 -30646784
9 -2237508990
10 -112000654080
11 -5124930562642
12 -227068649702400
13 -9819508698442846
14 -406371251899045888
15 -15094508095346343330
16 -394372545425757634560
17 7096803535075158290434
18 2430273114806112504446976

List of values

[1, 2, 10, 78, 792, 9250, 106080, 636286, -30646784, -2237508990, -112000654080, -5124930562642, -227068649702400, -9819508698442846, -406371251899045888, -15094508095346343330, -394372545425757634560, 7096803535075158290434, 2430273114806112504446976]

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

Content is available under The OEIS End-User License Agreement.