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.

A255256 Number A(n,k) of 2-colorings of a k X n rectangle such that no nontrivial subsquare has monochromatic corners; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 1
6 1
7 4
8 4
9 1
10 1
11 8
12 14
13 8
14 1
15 1
16 16
17 50
18 50
19 16
20 1
21 1
22 32
23 178
24 276
25 178
26 32
27 1
28 1
29 64
30 634
31 1498
32 1498
33 634
34 64
35 1
36 1
37 128
38 2258
39 8352
40 10980
41 8352
42 2258
43 128
44 1
45 1
46 256
47 8042
48 46730
49 85138
50 85138
51 46730
52 8042
53 256
54 1
55 1
56 512
57 28642
58 260204
59 655090
60 781712
61 655090
62 260204
63 28642
64 512
65 1

List of values

[1, 1, 1, 1, 2, 1, 1, 4, 4, 1, 1, 8, 14, 8, 1, 1, 16, 50, 50, 16, 1, 1, 32, 178, 276, 178, 32, 1, 1, 64, 634, 1498, 1498, 634, 64, 1, 1, 128, 2258, 8352, 10980, 8352, 2258, 128, 1, 1, 256, 8042, 46730, 85138, 85138, 46730, 8042, 256, 1, 1, 512, 28642, 260204, 655090, 781712, 655090, 260204, 28642, 512, 1]