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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.

A208039 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 0 1 vertically.

Table of values

n a(n)
1 2
2 4
3 4
4 6
5 16
6 6
7 9
8 36
9 36
10 9
11 15
12 81
13 102
14 81
15 13
16 25
17 225
18 289
19 279
20 169
21 19
22 40
23 625
24 1071
25 961
26 741
27 361
28 28
29 64
30 1600
31 3969
32 4743
33 3249
34 1995
35 784
36 41
37 104
38 4096
39 13230
40 23409
41 21147
42 11025
43 5404
44 1681
45 60
46 169
47 10816
48 44100
49 100215
50 137641
51 94605

List of values

[2, 4, 4, 6, 16, 6, 9, 36, 36, 9, 15, 81, 102, 81, 13, 25, 225, 289, 279, 169, 19, 40, 625, 1071, 961, 741, 361, 28, 64, 1600, 3969, 4743, 3249, 1995, 784, 41, 104, 4096, 13230, 23409, 21147, 11025, 5404, 1681, 60, 169, 10816, 44100, 100215, 137641, 94605]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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