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.

A268502 Expansion of Product_{k>=1} ((1 + k*x^k) / (1 - x^k))^k.

Table of values

n a(n)
0 1
1 2
2 8
3 26
4 73
5 210
6 558
7 1460
8 3663
9 9090
10 21846
11 51690
12 120140
13 274480
14 618656
15 1374792
16 3017867
17 6546610
18 14053312
19 29852658
20 62825894
21 131025056
22 270948160
23 555811298
24 1131498850
25 2286780266
26 4589706604
27 9151298134
28 18131193484
29 35706460678
30 69910352496

List of values

[1, 2, 8, 26, 73, 210, 558, 1460, 3663, 9090, 21846, 51690, 120140, 274480, 618656, 1374792, 3017867, 6546610, 14053312, 29852658, 62825894, 131025056, 270948160, 555811298, 1131498850, 2286780266, 4589706604, 9151298134, 18131193484, 35706460678, 69910352496]