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.

A181143 G.f.: A(x,y) = exp( Sum_{n>=1} [Sum_{k=0..n} C(n,k)^3*y^k] * x^n/n ) = Sum_{n>=0,k=0..n} T(n,k)*x^n*y^k, as a triangle of coefficients T(n,k) read by rows.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 5
5 1
6 1
7 14
8 14
9 1
10 1
11 30
12 85
13 30
14 1
15 1
16 55
17 337
18 337
19 55
20 1
21 1
22 91
23 1029
24 2230
25 1029
26 91
27 1
28 1
29 140
30 2632
31 10549
32 10549
33 2632
34 140
35 1
36 1
37 204
38 5922
39 39533
40 73157
41 39533
42 5922
43 204
44 1
45 1
46 285
47 12090
48 124805
49 384948
50 384948
51 124805
52 12090
53 285
54 1
55 1

List of values

[1, 1, 1, 1, 5, 1, 1, 14, 14, 1, 1, 30, 85, 30, 1, 1, 55, 337, 337, 55, 1, 1, 91, 1029, 2230, 1029, 91, 1, 1, 140, 2632, 10549, 10549, 2632, 140, 1, 1, 204, 5922, 39533, 73157, 39533, 5922, 204, 1, 1, 285, 12090, 124805, 384948, 384948, 124805, 12090, 285, 1, 1]