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 A185518 #7 Jul 22 2025 09:51:52 %S A185518 46303,9856209,541370505,65652458491,5157904182519,525819969687473, %T A185518 46861672135881249,4536327635584899147,421714260065729709743, %U A185518 40230435280135273840049,3792362066556802880530649 %N A185518 Number of (n+1)X7 0..2 arrays with every 2X2 subblock singular. %C A185518 Column 6 of A185521 %H A185518 R. H. Hardin, <a href="/A185518/b185518.txt">Table of n, a(n) for n = 1..200</a> %e A185518 Some solutions for 3X7 %e A185518 ..0..0..0..0..0..0..2....0..0..2..1..0..0..1....0..0..2..2..0..1..0 %e A185518 ..0..2..0..1..2..0..2....0..0..0..0..0..0..0....0..0..0..0..0..0..0 %e A185518 ..0..0..0..1..2..0..2....0..0..0..0..0..1..0....0..0..1..2..1..1..0 %K A185518 nonn %O A185518 1,1 %A A185518 _R. H. Hardin_ Jan 29 2011