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 A184685 #7 Jul 22 2025 09:41:28 %S A184685 11584,867152,37779664,2107074576,105530924944,5556396815504, %T A184685 286297979078416,14901599172048528,772255092178447120, %U A184685 40103190379637623184,2080745823672990984720,108004153792892136250000 %N A184685 Number of (n+1)X9 binary arrays with every 2X2 subblock singular. %C A184685 Column 8 of A184686 %H A184685 R. H. Hardin, <a href="/A184685/b184685.txt">Table of n, a(n) for n = 1..200</a> %e A184685 Some solutions for 3X9 %e A184685 ..1..0..1..1..0..0..1..0..1....0..0..0..1..1..1..1..1..0 %e A184685 ..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0 %e A184685 ..0..0..1..0..0..0..0..1..0....0..0..0..0..0..0..0..0..1 %K A184685 nonn %O A184685 1,1 %A A184685 _R. H. Hardin_ Jan 19 2011