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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.

A189904 Number of nX8 binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally.

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%I A189904 #6 Jul 22 2025 11:56:00
%S A189904 177,31329,5545233,395408137,30880712109,1951128590287,
%T A189904 111638761715758,6207537762978575,323783296887093516,
%U A189904 16672434688261743849,837559653906404095478,41615651706032541197843
%N A189904 Number of nX8 binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally.
%C A189904 Column 8 of A189905
%e A189904 Some solutions for 4X8
%e A189904 ..0..0..0..0..1..0..1..1....0..0..0..0..1..0..1..1....0..0..0..0..0..0..1..0
%e A189904 ..0..0..0..1..0..0..1..0....0..0..0..0..1..0..0..1....0..0..0..0..0..1..0..0
%e A189904 ..0..0..0..0..0..1..0..1....0..0..0..0..1..0..1..0....0..0..0..0..1..0..0..0
%e A189904 ..0..0..1..0..1..0..0..1....0..1..0..1..1..0..0..0....0..0..0..1..0..0..0..0
%K A189904 nonn
%O A189904 1,1
%A A189904 _R. H. Hardin_ May 01 2011

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