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 A189621 #7 Mar 15 2023 11:25:18 %S A189621 64,4096,61996,515560,6110500,118571483,2076231513,28823835852, %T A189621 385459961106,5723963509791,89346030665338,1342965562065607, %U A189621 19505273464622126,285343732611331021,4255443558501922341 %N A189621 Number of 6 X n binary arrays without the pattern 0 1 0 diagonally, antidiagonally or horizontally. %C A189621 Row 6 of A189617. %H A189621 R. H. Hardin, <a href="/A189621/b189621.txt">Table of n, a(n) for n = 1..200</a> %e A189621 Some solutions for 6 X 3 %e A189621 ..0..0..0....1..0..1....1..0..1....1..1..1....1..1..0....0..0..1....1..0..1 %e A189621 ..1..0..1....0..1..1....1..0..0....1..0..0....1..1..1....1..0..1....1..1..1 %e A189621 ..1..1..1....1..0..0....0..0..0....1..0..0....1..0..1....0..0..0....1..1..1 %e A189621 ..0..1..1....0..0..1....1..0..0....1..1..1....1..1..0....0..0..1....1..1..0 %e A189621 ..1..0..1....0..0..1....0..0..0....1..0..0....1..1..1....0..0..1....0..0..0 %e A189621 ..1..1..0....1..0..1....1..1..1....1..0..1....1..1..0....0..0..1....1..0..1 %Y A189621 Cf. A189617. %K A189621 nonn %O A189621 1,1 %A A189621 _R. H. Hardin_, Apr 24 2011