cp's OEIS Frontend

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.

A261372 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.

Table of values

n a(n)
1 36
2 41
3 202
4 1040
5 5633
6 42302
7 461576
8 5441268
9 87288274
10 1757770516
11 47269754142
12 1497418790742
13 65202132975489
14 3410709440318090
15 240487233522340499
16 20318813275802198468
17 2337266627779577763890

List of values

[36, 41, 202, 1040, 5633, 42302, 461576, 5441268, 87288274, 1757770516, 47269754142, 1497418790742, 65202132975489, 3410709440318090, 240487233522340499, 20318813275802198468, 2337266627779577763890]

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

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