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.

A012466 E.g.f. sec(arctan(x)^2) (even powers only).

Table of values

n a(n)
0 1
1 0
2 12
3 -480
4 37968
5 -4773120
6 878319552
7 -222512349696
8 74262725323008
9 -31578556041732096
10 16666719859336276992
11 -10690478515516973015040
12 8190555666463900906475520
13 -7387658525325188387856384000

List of values

[1, 0, 12, -480, 37968, -4773120, 878319552, -222512349696, 74262725323008, -31578556041732096, 16666719859336276992, -10690478515516973015040, 8190555666463900906475520, -7387658525325188387856384000]

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

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