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.

A331818 E.g.f.: exp(1 - sec(x)) (even powers only).

Table of values

n a(n)
0 1
1 -1
2 -2
3 -1
4 253
5 12854
6 668053
7 39148199
8 2456262898
9 130790155859
10 -3853032641387
11 -4312625669814166
12 -1531200886955161127
13 -489884373969089299201
14 -159097972223555719000922
15 -54064488830901650420384521
16 -19284261543086608770504566147

List of values

[1, -1, -2, -1, 253, 12854, 668053, 39148199, 2456262898, 130790155859, -3853032641387, -4312625669814166, -1531200886955161127, -489884373969089299201, -159097972223555719000922, -54064488830901650420384521, -19284261543086608770504566147]

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

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