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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.

A279240 Denominators of coefficients in expansion of (2 cos x)/(1 + cos(sqrt(x))).

Table of values

n a(n)
0 1
1 4
2 24
3 2880
4 40320
5 7257600
6 479001600
7 697426329600
8 20922789888000
9 261321375744000
10 221172909834240000
11 4496002911110430720000
12 620448401733239439360000
13 806582922253211271168000000
14 304888344611713860501504000000
15 4244045756995056938180935680000000

List of values

[1, 4, 24, 2880, 40320, 7257600, 479001600, 697426329600, 20922789888000, 261321375744000, 221172909834240000, 4496002911110430720000, 620448401733239439360000, 806582922253211271168000000, 304888344611713860501504000000, 4244045756995056938180935680000000]

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

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