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.

A165883 Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = (1-x)^(2*n+3)*( Sum_{j >= 0} (2*j+ 1)^n*x^j )*( Sum_{j >= 0} j^(n+1)*x^j ), read by rows.

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 1
5 10
6 26
7 10
8 1
9 1
10 34
11 287
12 508
13 287
14 34
15 1
16 1
17 102
18 2272
19 11098
20 19134
21 11098
22 2272
23 102
24 1
25 1
26 294
27 15493
28 169432
29 675706
30 1042948
31 675706
32 169432
33 15493
34 294
35 1
36 1
37 842
38 98374
39 2151026
40 17138559
41 55643460
42 82178676
43 55643460
44 17138559
45 2151026
46 98374
47 842
48 1

List of values

[1, 1, 2, 1, 1, 10, 26, 10, 1, 1, 34, 287, 508, 287, 34, 1, 1, 102, 2272, 11098, 19134, 11098, 2272, 102, 1, 1, 294, 15493, 169432, 675706, 1042948, 675706, 169432, 15493, 294, 1, 1, 842, 98374, 2151026, 17138559, 55643460, 82178676, 55643460, 17138559, 2151026, 98374, 842, 1]