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 A189262 #7 Jul 22 2025 11:38:49 %S A189262 54,2916,74869,1771206,38600001,830564651,17747766886,379055775099, %T A189262 8092834825779,172797606124166,3689743969531917,78791192655511218, %U A189262 1682561197005661625,35931167376074022171,767318458960721287707 %N A189262 Number of nX7 binary arrays without the pattern 0 0 1 diagonally, antidiagonally or horizontally. %C A189262 Column 7 of A189264 %H A189262 R. H. Hardin, <a href="/A189262/b189262.txt">Table of n, a(n) for n = 1..200</a> %e A189262 Some solutions for 7X3 %e A189262 ..1..1..0....1..1..1....1..1..1....0..1..0....0..1..0....1..1..0....0..0..0 %e A189262 ..0..1..1....1..0..1....0..1..1....1..1..1....1..1..1....0..1..0....1..1..1 %e A189262 ..1..1..1....1..1..0....1..1..1....1..0..1....1..1..1....1..0..0....0..1..0 %e A189262 ..1..1..1....0..0..1....1..1..0....1..1..0....1..1..1....1..1..0....1..1..1 %e A189262 ..1..1..0....1..1..1....1..0..1....1..1..1....0..1..1....0..0..0....1..1..1 %e A189262 ..1..0..0....0..1..0....0..1..1....1..0..1....1..1..1....0..1..0....0..1..0 %e A189262 ..1..0..0....1..1..0....0..1..1....1..1..0....1..0..0....0..1..0....0..0..0 %K A189262 nonn %O A189262 1,1 %A A189262 _R. H. Hardin_ Apr 19 2011