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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.

A216182 Riordan array ((1+x)/(1-x)^2, x(1+x)^2/(1-x)^2).

Table of values

n a(n)
0 1
1 3
2 1
3 5
4 7
5 1
6 7
7 25
8 11
9 1
10 9
11 63
12 61
13 15
14 1
15 11
16 129
17 231
18 113
19 19
20 1
21 13
22 231
23 681
24 575
25 181
26 23
27 1
28 15
29 377
30 1683
31 2241
32 1159
33 265
34 27
35 1
36 17
37 575
38 3653
39 7183
40 5641
41 2047
42 365
43 31
44 1
45 19
46 833
47 7183
48 19825
49 22363
50 11969
51 3303
52 481
53 35
54 1

List of values

[1, 3, 1, 5, 7, 1, 7, 25, 11, 1, 9, 63, 61, 15, 1, 11, 129, 231, 113, 19, 1, 13, 231, 681, 575, 181, 23, 1, 15, 377, 1683, 2241, 1159, 265, 27, 1, 17, 575, 3653, 7183, 5641, 2047, 365, 31, 1, 19, 833, 7183, 19825, 22363, 11969, 3303, 481, 35, 1]