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.

A354661 G.f. A(x) satisfies: 1 = Sum_{n=-oo..oo} (-x)^(n*(n+1)/2) * A(x)^(n*(n-1)/2), with A(0) = 0.

Table of values

n a(n)
1 1
2 0
3 0
4 2
5 0
6 0
7 8
8 0
9 0
10 44
11 0
12 6
13 280
14 0
15 96
16 1934
17 0
18 1124
19 14088
20 18
21 11792
22 106536
23 648
24 117626
25 828360
26 13416
27 1142288
28 6580780
29 216000
30 10921088
31 53184864
32 3019614
33 103408416
34 435930008
35 38629656
36 973041448
37 3615741192
38 465419760
39 9118011128
40 30298375236

List of values

[1, 0, 0, 2, 0, 0, 8, 0, 0, 44, 0, 6, 280, 0, 96, 1934, 0, 1124, 14088, 18, 11792, 106536, 648, 117626, 828360, 13416, 1142288, 6580780, 216000, 10921088, 53184864, 3019614, 103408416, 435930008, 38629656, 973041448, 3615741192, 465419760, 9118011128, 30298375236]