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.

A110291 Riordan array (1/(1-x), x*(1+2*x)).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 3
5 1
6 1
7 3
8 5
9 1
10 1
11 3
12 9
13 7
14 1
15 1
16 3
17 9
18 19
19 9
20 1
21 1
22 3
23 9
24 27
25 33
26 11
27 1
28 1
29 3
30 9
31 27
32 65
33 51
34 13
35 1
36 1
37 3
38 9
39 27
40 81
41 131
42 73
43 15
44 1
45 1
46 3
47 9
48 27
49 81
50 211
51 233
52 99
53 17
54 1
55 1
56 3
57 9
58 27
59 81
60 243
61 473
62 379
63 129
64 19
65 1
66 1
67 3
68 9
69 27
70 81
71 243
72 665
73 939
74 577
75 163
76 21
77 1

List of values

[1, 1, 1, 1, 3, 1, 1, 3, 5, 1, 1, 3, 9, 7, 1, 1, 3, 9, 19, 9, 1, 1, 3, 9, 27, 33, 11, 1, 1, 3, 9, 27, 65, 51, 13, 1, 1, 3, 9, 27, 81, 131, 73, 15, 1, 1, 3, 9, 27, 81, 211, 233, 99, 17, 1, 1, 3, 9, 27, 81, 243, 473, 379, 129, 19, 1, 1, 3, 9, 27, 81, 243, 665, 939, 577, 163, 21, 1]