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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.

A284158 Number of n X n 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

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%I A284158 #6 Apr 06 2020 00:31:40
%S A284158 1,4,62,5888,2179255,3648835932,25064817057781,708804054303474038
%N A284158 Number of n X n 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
%C A284158 Diagonal of A284165.
%e A284158 Some solutions for n=4
%e A284158 ..0..1..0..0. .0..0..1..1. .0..0..1..1. .0..1..1..0. .0..0..0..1
%e A284158 ..1..0..1..1. .0..1..0..0. .0..0..1..1. .0..1..0..1. .0..0..1..0
%e A284158 ..0..0..1..1. .1..1..0..0. .0..1..1..1. .0..1..1..0. .1..1..0..0
%e A284158 ..1..0..1..0. .1..1..1..0. .0..1..1..1. .1..0..0..1. .1..1..1..1
%Y A284158 Cf. A284165.
%K A284158 nonn
%O A284158 1,2
%A A284158 _R. H. Hardin_, Mar 21 2017

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