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.

A152094 Quartic product sequence: a(n) = Product_{k=1..floor((n-1)/2)} (1 + m*cos(k*Pi/n)^2 + q*cos(k*Pi/n)^4 ), with m = 2*4, q=2*4^3.

Table of values

n a(n)
0 1
1 1
2 1
3 11
4 37
5 179
6 869
7 3683
8 18389
9 80179
10 385029
11 1739651
12 8134709
13 37397203
14 173097317
15 799986979
16 3694294933
17 17085418099
18 78904394437
19 364797113027
20 1685324681973
21 7789441113619
22 35993781049381
23 166339303316579

List of values

[1, 1, 1, 11, 37, 179, 869, 3683, 18389, 80179, 385029, 1739651, 8134709, 37397203, 173097317, 799986979, 3694294933, 17085418099, 78904394437, 364797113027, 1685324681973, 7789441113619, 35993781049381, 166339303316579]