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.

A263246 Expansion of e.g.f.: sin(r*x) / sqrt(1 + cos(r*x)^2) where r = sqrt(2), odd powers only.

Table of values

n a(n)
1 1
2 1
3 -11
4 -491
5 -11159
6 460681
7 103577629
8 8160790429
9 -624333860399
10 -386787409545839
11 -68810049201689531
12 6999828208693648549
13 9872674440874152431161
14 3255253386897615662908441
15 -346248578699462435167833491
16 -1072454627614122049417452882131
17 -584579592415141205182370782224479
18 47874474639430619859527348515679521

List of values

[1, 1, -11, -491, -11159, 460681, 103577629, 8160790429, -624333860399, -386787409545839, -68810049201689531, 6999828208693648549, 9872674440874152431161, 3255253386897615662908441, -346248578699462435167833491, -1072454627614122049417452882131, -584579592415141205182370782224479, 47874474639430619859527348515679521]