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.
%I A188566 #7 Jul 22 2025 11:16:27 %S A188566 149,22201,1315783,108485757,8927734479,703601341153,56394861720488, %T A188566 4515869742994831,360954508416470472,28877150666649667161, %U A188566 2309866725886227499401,184755280244849565353940 %N A188566 Number of nX8 binary arrays without the pattern 1 1 1 diagonally, vertically or horizontally. %C A188566 Column 8 of A188567 %H A188566 R. H. Hardin, <a href="/A188566/b188566.txt">Table of n, a(n) for n = 1..200</a> %e A188566 Some solutions for 3X8 %e A188566 ..0..0..0..1..0..1..0..0....0..0..0..0..0..1..1..0....0..0..1..0..0..1..1..0 %e A188566 ..0..1..1..0..1..1..0..0....0..0..1..1..0..0..1..1....0..0..1..0..0..1..0..0 %e A188566 ..0..0..0..0..1..0..0..1....0..0..1..0..0..0..0..0....0..1..0..0..0..0..1..1 %K A188566 nonn %O A188566 1,1 %A A188566 _R. H. Hardin_ Apr 04 2011