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.

A112475 Riordan array (1/(1+x),x(1+x)/(1-x)).

Table of values

n a(n)
0 1
1 -1
2 1
3 1
4 1
5 1
6 -1
7 1
8 3
9 1
10 1
11 1
12 5
13 5
14 1
15 -1
16 1
17 7
18 13
19 7
20 1
21 1
22 1
23 9
24 25
25 25
26 9
27 1
28 -1
29 1
30 11
31 41
32 63
33 41
34 11
35 1
36 1
37 1
38 13
39 61
40 129
41 129
42 61
43 13
44 1
45 -1
46 1
47 15
48 85
49 231
50 321
51 231
52 85
53 15
54 1
55 1
56 1
57 17
58 113
59 377
60 681
61 681
62 377
63 113
64 17
65 1

List of values

[1, -1, 1, 1, 1, 1, -1, 1, 3, 1, 1, 1, 5, 5, 1, -1, 1, 7, 13, 7, 1, 1, 1, 9, 25, 25, 9, 1, -1, 1, 11, 41, 63, 41, 11, 1, 1, 1, 13, 61, 129, 129, 61, 13, 1, -1, 1, 15, 85, 231, 321, 231, 85, 15, 1, 1, 1, 17, 113, 377, 681, 681, 377, 113, 17, 1]