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 A189910 #6 Jul 22 2025 11:56:42 %S A189910 177,31329,5545233,354894796,22333076803,1435483321366,94632691298302, %T A189910 6207537762978575,401408206411689570,25850136024684855135 %N A189910 Number of 8Xn binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally. %C A189910 Row 8 of A189905 %e A189910 Some solutions for 8X4 %e A189910 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A189910 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A189910 ..0..0..0..0....0..0..0..0....1..0..0..0....0..1..0..1....0..1..1..1 %e A189910 ..0..0..0..0....1..0..0..0....0..0..0..0....0..0..1..0....0..0..0..0 %e A189910 ..0..1..1..1....0..1..0..1....1..0..0..0....0..1..0..1....1..0..0..1 %e A189910 ..0..0..0..0....0..0..1..0....1..1..0..0....1..0..0..1....0..1..0..0 %e A189910 ..0..0..0..0....0..0..0..0....0..0..1..0....0..1..0..0....0..0..1..0 %e A189910 ..0..0..0..0....1..0..0..0....1..1..0..0....0..0..1..0....1..0..0..1 %K A189910 nonn %O A189910 1,1 %A A189910 _R. H. Hardin_ May 01 2011