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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.

A202978 Number of n X 7 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.

Table of values

n a(n)
1 1
2 69
3 3507
4 122468
5 4590696
6 170937904
7 6330398606
8 235362503738
9 8754859878268
10 325475861455984
11 12099539397621289
12 449821095241853452
13 16722911203146960563
14 621702975576594657954
15 23112884157721171287549

List of values

[1, 69, 3507, 122468, 4590696, 170937904, 6330398606, 235362503738, 8754859878268, 325475861455984, 12099539397621289, 449821095241853452, 16722911203146960563, 621702975576594657954, 23112884157721171287549]

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

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