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.

A116382 Riordan array (1/sqrt(1-4*x^2), (1-2*x^2*c(x^2))*(x^2*c(x^2))/(x*(1-x-x^2*c(x^2)))) where c(x) is the g.f. of A000108.

Table of values

n a(n)
0 1
1 0
2 1
3 2
4 1
5 1
6 0
7 3
8 2
9 1
10 6
11 4
12 5
13 3
14 1
15 0
16 10
17 10
18 8
19 4
20 1
21 20
22 15
23 21
24 19
25 12
26 5
27 1
28 0
29 35
30 42
31 42
32 32
33 17
34 6
35 1
36 70
37 56
38 84
39 92
40 77
41 50
42 23
43 7
44 1
45 0
46 126
47 168
48 192
49 180
50 131
51 74
52 30
53 8
54 1
55 252
56 210
57 330
58 405
59 400
60 326
61 210
62 105
63 38
64 9
65 1

List of values

[1, 0, 1, 2, 1, 1, 0, 3, 2, 1, 6, 4, 5, 3, 1, 0, 10, 10, 8, 4, 1, 20, 15, 21, 19, 12, 5, 1, 0, 35, 42, 42, 32, 17, 6, 1, 70, 56, 84, 92, 77, 50, 23, 7, 1, 0, 126, 168, 192, 180, 131, 74, 30, 8, 1, 252, 210, 330, 405, 400, 326, 210, 105, 38, 9, 1]