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.

A188285 Riordan matrix ( (1-2x)/(1-2x-x^2), (x-2x^2)/(1-2x-x^2) ).

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 0
5 1
6 2
7 2
8 0
9 1
10 5
11 4
12 3
13 0
14 1
15 12
16 11
17 6
18 4
19 0
20 1
21 29
22 28
23 18
24 8
25 5
26 0
27 1
28 70
29 72
30 48
31 26
32 10
33 6
34 0
35 1
36 169
37 184
38 130
39 72
40 35
41 12
42 7
43 0
44 1
45 408
46 469
47 348
48 204
49 100
50 45
51 14
52 8
53 0
54 1
55 985
56 1192
57 927
58 568
59 295
60 132
61 56
62 16
63 9
64 0
65 1
66 2378
67 3022
68 2456
69 1571
70 850
71 404
72 168
73 68
74 18
75 10
76 0
77 1
78 5741
79 7644
80 6477
81 4312
82 2430
83 1200
84 532
85 208
86 81
87 20
88 11
89 0
90 1

List of values

[1, 0, 1, 1, 0, 1, 2, 2, 0, 1, 5, 4, 3, 0, 1, 12, 11, 6, 4, 0, 1, 29, 28, 18, 8, 5, 0, 1, 70, 72, 48, 26, 10, 6, 0, 1, 169, 184, 130, 72, 35, 12, 7, 0, 1, 408, 469, 348, 204, 100, 45, 14, 8, 0, 1, 985, 1192, 927, 568, 295, 132, 56, 16, 9, 0, 1, 2378, 3022, 2456, 1571, 850, 404, 168, 68, 18, 10, 0, 1, 5741, 7644, 6477, 4312, 2430, 1200, 532, 208, 81, 20, 11, 0, 1]