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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.

A188688 Number of n X n binary arrays without the pattern 0 1 0 diagonally, vertically, antidiagonally or horizontally.

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%I A188688 #8 Apr 10 2022 15:39:28
%S A188688 2,16,218,4008,139307,15547072,3647921173,1302269111985,
%T A188688 832889881464413,1248703703842553735,4253189666054817624993
%N A188688 Number of n X n binary arrays without the pattern 0 1 0 diagonally, vertically, antidiagonally or horizontally.
%C A188688 Diagonal of A188695.
%e A188688 Some solutions for 4 X 4
%e A188688 ..0..0..0..1....0..0..0..0....1..1..0..0....1..0..1..1....1..1..1..0
%e A188688 ..1..0..0..0....1..0..1..1....0..0..0..0....0..0..1..1....1..1..0..1
%e A188688 ..1..0..0..0....1..1..1..1....0..0..0..0....0..0..1..1....1..1..0..1
%e A188688 ..0..1..1..1....0..1..1..1....1..0..0..0....0..1..1..1....1..0..1..1
%Y A188688 Cf. A188695.
%K A188688 nonn
%O A188688 1,1
%A A188688 _R. H. Hardin_, Apr 08 2011

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