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.

A122016 Riordan array(1, x*(1+2*x)/(1-x)).

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 3
5 1
6 0
7 3
8 6
9 1
10 0
11 3
12 15
13 9
14 1
15 0
16 3
17 24
18 36
19 12
20 1
21 0
22 3
23 33
24 90
25 66
26 15
27 1
28 0
29 3
30 42
31 171
32 228
33 105
34 18
35 1
36 0
37 3
38 51
39 279
40 579
41 465
42 153
43 21
44 1
45 0
46 3
47 60
48 414
49 1200
50 1500
51 828
52 210
53 24
54 1
55 0
56 3
57 69
58 576
59 2172
60 3858
61 3258
62 1344
63 276
64 27
65 1

List of values

[1, 0, 1, 0, 3, 1, 0, 3, 6, 1, 0, 3, 15, 9, 1, 0, 3, 24, 36, 12, 1, 0, 3, 33, 90, 66, 15, 1, 0, 3, 42, 171, 228, 105, 18, 1, 0, 3, 51, 279, 579, 465, 153, 21, 1, 0, 3, 60, 414, 1200, 1500, 828, 210, 24, 1, 0, 3, 69, 576, 2172, 3858, 3258, 1344, 276, 27, 1]