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 A188693 #7 Jul 22 2025 11:18:37 %S A188693 65,4225,69852,708519,9908740,196218615,3647921173,58576420100, %T A188693 923989193674,15401563228402,262861087544592,4415950575544932, %U A188693 73179716713561551,1215743329351151607,20324632650740759847 %N A188693 Number of nX7 binary arrays without the pattern 0 1 0 diagonally, vertically, antidiagonally or horizontally. %C A188693 Column 7 of A188695 %H A188693 R. H. Hardin, <a href="/A188693/b188693.txt">Table of n, a(n) for n = 1..200</a> %e A188693 Some solutions for 4X7 %e A188693 ..0..0..0..1..1..1..1....0..0..1..1..1..1..1....0..0..1..1..1..1..0 %e A188693 ..0..0..1..1..1..1..0....0..0..0..0..1..1..1....0..0..0..0..0..1..1 %e A188693 ..0..0..1..1..1..0..0....1..0..0..0..1..1..1....1..1..1..0..1..1..1 %e A188693 ..0..0..1..1..1..0..0....1..1..1..1..1..1..1....1..1..1..1..1..1..1 %K A188693 nonn %O A188693 1,1 %A A188693 _R. H. Hardin_ Apr 08 2011