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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.

A188767 Number of n X n binary arrays without the pattern 0 1 0 vertically or horizontally.

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%I A188767 #8 Jul 22 2025 11:22:00
%S A188767 2,16,240,7868,738031,186969392,118984786902,191430611504482,
%T A188767 791786310866344064,8423565813650647334361,
%U A188767 229714505025192315490199222,16049804227721101224353628972128
%N A188767 Number of n X n binary arrays without the pattern 0 1 0 vertically or horizontally.
%C A188767 Diagonal of A188774
%e A188767 Some solutions for 3X3
%e A188767 ..1..1..1....1..0..1....1..1..0....1..1..1....0..1..1....0..1..1....1..1..1
%e A188767 ..0..1..1....1..1..1....1..1..0....0..1..1....1..1..1....0..0..1....0..0..0
%e A188767 ..1..1..1....1..1..0....1..0..0....0..0..1....1..0..1....0..0..0....1..0..0
%K A188767 nonn
%O A188767 1,1
%A A188767 _R. H. Hardin_ Apr 09 2011

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