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.

A181031 Array read by antidiagonals: T(n,k) = number of n X k binary matrices with no initial bit string in any row or column divisible by 4.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 1
7 1
8 3
9 3
10 1
11 1
12 5
13 7
14 5
15 1
16 1
17 8
18 17
19 17
20 8
21 1
22 1
23 13
24 41
25 63
26 41
27 13
28 1
29 1
30 21
31 99
32 227
33 227
34 99
35 21
36 1
37 1
38 34
39 239
40 827
41 1234
42 827
43 239
44 34
45 1
46 1
47 55
48 577
49 2999
50 6743
51 6743
52 2999
53 577
54 55
55 1
56 1
57 89
58 1393
59 10897
60 36787
61 55447
62 36787
63 10897
64 1393
65 89
66 1
67 1
68 144

List of values

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 5, 7, 5, 1, 1, 8, 17, 17, 8, 1, 1, 13, 41, 63, 41, 13, 1, 1, 21, 99, 227, 227, 99, 21, 1, 1, 34, 239, 827, 1234, 827, 239, 34, 1, 1, 55, 577, 2999, 6743, 6743, 2999, 577, 55, 1, 1, 89, 1393, 10897, 36787, 55447, 36787, 10897, 1393, 89, 1, 1, 144]