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.

A303439 Expansion of Product_{k>=1} ((1 - 2^k*x^k)/(1 + 2^k*x^k))^(1/2^k).

Table of values

n a(n)
0 1
1 -2
2 0
3 -2
4 6
5 -6
6 4
7 -6
8 48
9 -118
10 96
11 -78
12 470
13 -810
14 396
15 -3050
16 11062
17 -12678
18 7072
19 -21454
20 80034
21 -201490
22 218940
23 -200658
24 1536724
25 -3268842
26 2079312
27 -7013266
28 23140282
29 -28227510
30 24133668
31 -56293910
32 288065712
33 -704485126
34 629862288
35 -1176210654

List of values

[1, -2, 0, -2, 6, -6, 4, -6, 48, -118, 96, -78, 470, -810, 396, -3050, 11062, -12678, 7072, -21454, 80034, -201490, 218940, -200658, 1536724, -3268842, 2079312, -7013266, 23140282, -28227510, 24133668, -56293910, 288065712, -704485126, 629862288, -1176210654]