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.

A201701 Riordan triangle ((1-x)/(1-2*x), x^2/(1-2*x)).

Table of values

n a(n)
0 1
1 1
2 0
3 2
4 1
5 0
6 4
7 3
8 0
9 0
10 8
11 8
12 1
13 0
14 0
15 16
16 20
17 5
18 0
19 0
20 0
21 32
22 48
23 18
24 1
25 0
26 0
27 0
28 64
29 112
30 56
31 7
32 0
33 0
34 0
35 0
36 128
37 256
38 160
39 32
40 1
41 0
42 0
43 0
44 0
45 256
46 576
47 432
48 120
49 9
50 0
51 0
52 0
53 0
54 0
55 512
56 1280
57 1120
58 400
59 50
60 1
61 0
62 0
63 0
64 0
65 0

List of values

[1, 1, 0, 2, 1, 0, 4, 3, 0, 0, 8, 8, 1, 0, 0, 16, 20, 5, 0, 0, 0, 32, 48, 18, 1, 0, 0, 0, 64, 112, 56, 7, 0, 0, 0, 0, 128, 256, 160, 32, 1, 0, 0, 0, 0, 256, 576, 432, 120, 9, 0, 0, 0, 0, 0, 512, 1280, 1120, 400, 50, 1, 0, 0, 0, 0, 0]