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 A189778 #7 Jul 22 2025 11:54:33 %S A189778 181,32761,5929741,530389481,44835555921,3292640179737, %T A189778 256681706358532,19742364192283882,1563337091301143920, %U A189778 122856570846133660189,9713292881930768378666,764499527960618934733556 %N A189778 Number of nX8 binary arrays without the pattern 1 0 0 1 diagonally, vertically or horizontally. %C A189778 Column 8 of A189779 %H A189778 R. H. Hardin, <a href="/A189778/b189778.txt">Table of n, a(n) for n = 1..36</a> %e A189778 Some solutions for 5X8 %e A189778 ..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %e A189778 ..1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0 %e A189778 ..0..1..1..1..0..0..0..0....1..0..1..1..0..0..0..0....0..1..1..0..0..0..0..0 %e A189778 ..0..0..0..0..0..0..0..0....0..0..1..0..0..0..0..0....1..1..1..0..0..0..0..0 %e A189778 ..0..0..0..0..0..1..1..1....1..1..0..0..0..0..0..1....0..1..1..1..1..1..0..0 %K A189778 nonn %O A189778 1,1 %A A189778 _R. H. Hardin_ Apr 27 2011