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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.

A207808 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 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 10
8 36
9 36
10 10
11 16
12 100
13 102
14 100
15 16
16 26
17 256
18 378
19 370
20 256
21 26
22 42
23 676
24 1260
25 1970
26 1232
27 676
28 42
29 68
30 1764
31 4374
32 9040
33 9168
34 4238
35 1764
36 68
37 110
38 4624
39 14946
40 43990
41 57184
42 44538
43 14406
44 4624
45 110
46 178
47 12100
48 51384
49 209050
50 382288

List of values

[2, 4, 4, 6, 16, 6, 10, 36, 36, 10, 16, 100, 102, 100, 16, 26, 256, 378, 370, 256, 26, 42, 676, 1260, 1970, 1232, 676, 42, 68, 1764, 4374, 9040, 9168, 4238, 1764, 68, 110, 4624, 14946, 43990, 57184, 44538, 14406, 4624, 110, 178, 12100, 51384, 209050, 382288]

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

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