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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.

A297682 T(n,k)=Number of nXk 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1s.

Table of values

n a(n)
1 2
2 4
3 4
4 7
5 11
6 8
7 13
8 29
9 33
10 16
11 24
12 80
13 150
14 98
15 32
16 44
17 219
18 629
19 742
20 291
21 64
22 81
23 597
24 2790
25 4633
26 3744
27 865
28 128
29 149
30 1632
31 12110
32 32911
33 34872
34 18840
35 2570
36 256
37 274
38 4459
39 52889
40 221420
41 401678
42 260924
43 94891
44 7637
45 512
46 504
47 12181
48 230406
49 1519630

List of values

[2, 4, 4, 7, 11, 8, 13, 29, 33, 16, 24, 80, 150, 98, 32, 44, 219, 629, 742, 291, 64, 81, 597, 2790, 4633, 3744, 865, 128, 149, 1632, 12110, 32911, 34872, 18840, 2570, 256, 274, 4459, 52889, 221420, 401678, 260924, 94891, 7637, 512, 504, 12181, 230406, 1519630]

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

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