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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.

A154948 Riordan array ((1+x)/(1-x^2)^2, x(1+x)/(1-x)).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 3
5 1
6 2
7 6
8 5
9 1
10 3
11 10
12 14
13 7
14 1
15 3
16 15
17 30
18 26
19 9
20 1
21 4
22 21
23 55
24 70
25 42
26 11
27 1
28 4
29 28
30 91
31 155
32 138
33 62
34 13
35 1
36 5
37 36
38 140
39 301
40 363
41 242
42 86
43 15
44 1
45 5
46 45
47 204
48 532
49 819
50 743
51 390
52 114
53 17
54 1
55 6
56 55
57 285
58 876
59 1652
60 1925
61 1375
62 590
63 146
64 19
65 1

List of values

[1, 1, 1, 2, 3, 1, 2, 6, 5, 1, 3, 10, 14, 7, 1, 3, 15, 30, 26, 9, 1, 4, 21, 55, 70, 42, 11, 1, 4, 28, 91, 155, 138, 62, 13, 1, 5, 36, 140, 301, 363, 242, 86, 15, 1, 5, 45, 204, 532, 819, 743, 390, 114, 17, 1, 6, 55, 285, 876, 1652, 1925, 1375, 590, 146, 19, 1]