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.

A012115 Expansion of e.g.f. of cos(arcsin(arcsinh(x))), even powers only.

Table of values

n a(n)
0 1
1 -1
2 1
3 -49
4 897
5 -96801
6 6803457
7 -1275363153
8 207592347393
9 -60889593787713
10 17888210916886017
11 -7679611833095218545
12 3530100224793651058305
13 -2109645360096014314212705
14 1387893136694794953345211905
15 -1109191050707015380265790041745
16 984063632341385922413073350925825

List of values

[1, -1, 1, -49, 897, -96801, 6803457, -1275363153, 207592347393, -60889593787713, 17888210916886017, -7679611833095218545, 3530100224793651058305, -2109645360096014314212705, 1387893136694794953345211905, -1109191050707015380265790041745, 984063632341385922413073350925825]

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

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