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 A188507 #7 Jul 22 2025 11:14:26 %S A188507 114,12996,423074,9787958,288040928,10000092025,335304991524, %T A188507 10679333746605,339310586309097,10918718979436711,352511901498687057, %U A188507 11353212589309062333,365199323625699877767,11751342219622127826211 %N A188507 Number of nX8 binary arrays without the pattern 0 1 0 diagonally, vertically or horizontally. %C A188507 Column 8 of A188508 %H A188507 R. H. Hardin, <a href="/A188507/b188507.txt">Table of n, a(n) for n = 1..200</a> %e A188507 Some solutions for 3X8 %e A188507 ..0..1..1..0..0..0..0..0....0..0..1..1..1..1..0..0....0..1..1..1..0..0..0..1 %e A188507 ..0..1..1..0..0..0..0..0....0..0..0..0..0..1..1..0....0..1..1..0..0..1..1..0 %e A188507 ..1..0..1..1..1..1..1..0....1..1..1..0..1..1..1..1....0..0..1..1..1..1..1..1 %K A188507 nonn %O A188507 1,1 %A A188507 _R. H. Hardin_ Apr 02 2011