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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.

A189779 T(n,k)=Number of nXk binary arrays without the pattern 1 0 0 1 diagonally, vertically or horizontally.

Table of values

n a(n)
1 2
2 4
3 4
4 8
5 16
6 8
7 15
8 64
9 64
10 15
11 28
12 225
13 512
14 225
15 28
16 52
17 784
18 3375
19 3375
20 784
21 52
22 97
23 2704
24 21952
25 37976
26 21952
27 2704
28 97
29 181
30 9409
31 140608
32 418550
33 418550
34 140608
35 9409
36 181
37 338
38 32761
39 912673
40 4461435
41 7767740
42 4461435
43 912673
44 32761
45 338
46 631

List of values

[2, 4, 4, 8, 16, 8, 15, 64, 64, 15, 28, 225, 512, 225, 28, 52, 784, 3375, 3375, 784, 52, 97, 2704, 21952, 37976, 21952, 2704, 97, 181, 9409, 140608, 418550, 418550, 140608, 9409, 181, 338, 32761, 912673, 4461435, 7767740, 4461435, 912673, 32761, 338, 631]

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

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