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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.

A231376 Number of n X 2 0..1 arrays with no element less than a strict majority of its horizontal and vertical neighbors.

Table of values

n a(n)
1 2
2 10
3 21
4 48
5 113
6 261
7 601
8 1390
9 3216
10 7435
11 17190
12 39751
13 91921
14 212555
15 491510
16 1136570
17 2628207
18 6077470
19 14053561
20 32497507
21 75147355
22 173771026
23 401828790
24 929190453
25 2148663614
26 4968578109
27 11489359399
28 26568039511
29 61436038272

List of values

[2, 10, 21, 48, 113, 261, 601, 1390, 3216, 7435, 17190, 39751, 91921, 212555, 491510, 1136570, 2628207, 6077470, 14053561, 32497507, 75147355, 173771026, 401828790, 929190453, 2148663614, 4968578109, 11489359399, 26568039511, 61436038272]

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

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