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.

A144903 Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of x/((1-x-x^3)*(1-x)^(k-1)).

Table of values

n a(n)
0 0
1 0
2 1
3 0
4 1
5 0
6 0
7 1
8 1
9 0
10 0
11 1
12 2
13 1
14 1
15 0
16 1
17 3
18 3
19 2
20 1
21 0
22 1
23 4
24 6
25 5
26 3
27 1
28 0
29 1
30 5
31 10
32 11
33 8
34 4
35 2
36 0
37 1
38 6
39 15
40 21
41 19
42 12
43 6
44 3
45 0
46 1
47 7
48 21
49 36
50 40
51 31
52 18
53 9
54 4
55 0
56 1
57 8
58 28
59 57
60 76
61 71
62 49
63 27
64 13
65 6
66 0
67 1
68 9
69 36
70 85
71 133
72 147
73 120
74 76
75 40
76 19
77 9
78 0
79 1
80 10
81 45
82 121
83 218
84 280
85 267
86 196
87 116
88 59
89 28
90 13

List of values

[0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 2, 1, 1, 0, 1, 3, 3, 2, 1, 0, 1, 4, 6, 5, 3, 1, 0, 1, 5, 10, 11, 8, 4, 2, 0, 1, 6, 15, 21, 19, 12, 6, 3, 0, 1, 7, 21, 36, 40, 31, 18, 9, 4, 0, 1, 8, 28, 57, 76, 71, 49, 27, 13, 6, 0, 1, 9, 36, 85, 133, 147, 120, 76, 40, 19, 9, 0, 1, 10, 45, 121, 218, 280, 267, 196, 116, 59, 28, 13]