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.

A165891 Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = (1/x)*(1-x)^n*(1+x)^(n+2)*( 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 6
6 10
7 6
8 1
9 1
10 14
11 47
12 68
13 47
14 14
15 1
16 1
17 30
18 176
19 450
20 606
21 450
22 176
23 30
24 1
25 1
26 62
27 597
28 2392
29 5162
30 6612
31 5162
32 2392
33 597
34 62
35 1
36 1
37 126
38 1926
39 11382
40 35967
41 69132
42 85492
43 69132
44 35967
45 11382
46 1926
47 126
48 1
49 1
50 254
51 6043
52 50892
53 223785
54 600546
55 1060411
56 1277096
57 1060411
58 600546
59 223785
60 50892
61 6043
62 254
63 1

List of values

[1, 1, 2, 1, 1, 6, 10, 6, 1, 1, 14, 47, 68, 47, 14, 1, 1, 30, 176, 450, 606, 450, 176, 30, 1, 1, 62, 597, 2392, 5162, 6612, 5162, 2392, 597, 62, 1, 1, 126, 1926, 11382, 35967, 69132, 85492, 69132, 35967, 11382, 1926, 126, 1, 1, 254, 6043, 50892, 223785, 600546, 1060411, 1277096, 1060411, 600546, 223785, 50892, 6043, 254, 1]