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.

A143019 Infinite square array read by antidiagonals: a(q,n) is the coefficient of z^n in the series expansion of C(z)^q/(1-4z)^(3/2), where C(z) = (1-sqrt(1-4z))/(2z) is the Catalan function (q,n = 0,1,2,...).

Table of values

n a(n)
0 1
1 1
2 6
3 1
4 7
5 30
6 1
7 8
8 38
9 140
10 1
11 9
12 47
13 187
14 630
15 1
16 10
17 57
18 244
19 874
20 2772
21 1
22 11
23 68
24 312
25 1186
26 3958
27 12012
28 1
29 12
30 80
31 392
32 1578
33 5536
34 17548
35 51480
36 1
37 13
38 93
39 485
40 2063
41 7599
42 25147
43 76627
44 218790
45 1
46 14
47 107
48 592
49 2655
50 10254
51 35401
52 112028
53 330818

List of values

[1, 1, 6, 1, 7, 30, 1, 8, 38, 140, 1, 9, 47, 187, 630, 1, 10, 57, 244, 874, 2772, 1, 11, 68, 312, 1186, 3958, 12012, 1, 12, 80, 392, 1578, 5536, 17548, 51480, 1, 13, 93, 485, 2063, 7599, 25147, 76627, 218790, 1, 14, 107, 592, 2655, 10254, 35401, 112028, 330818]