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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.

A207301 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically.

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%I A207301 #8 Jul 22 2025 20:16:39
%S A207301 2,16,98,643,3773,23091,154228,1050811,7236644,51776044,383107149,
%T A207301 2907310903,22583670553,180085426836,1470632881207
%N A207301 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically.
%C A207301 Diagonal of A207305
%e A207301 Some solutions for n=4
%e A207301 ..0..1..0..0....1..0..0..1....1..1..1..1....0..0..1..1....1..0..0..1
%e A207301 ..1..0..0..1....0..1..1..0....1..1..1..1....0..0..1..1....0..1..0..0
%e A207301 ..1..1..0..0....1..1..0..0....1..1..1..1....0..0..1..1....1..1..0..0
%e A207301 ..1..1..0..0....0..1..1..0....1..1..1..1....0..0..1..1....1..1..0..0
%K A207301 nonn
%O A207301 1,1
%A A207301 _R. H. Hardin_ Feb 16 2012

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