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 A185430 #7 Jul 22 2025 09:46:23 %S A185430 212298419684,41910604337378,4772160687307074,378372621022753476, %T A185430 22687513754718781985,1081599389409258559731,42451419931252675522287, %U A185430 1407901157465200331154523,40264870455486645310499349 %N A185430 Number of (n+2)X6 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order. %C A185430 Column 4 of A185435 %H A185430 R. H. Hardin, <a href="/A185430/b185430.txt">Table of n, a(n) for n = 1..114</a> %e A185430 Some solutions for 4X6 %e A185430 ..0..0..0..0..0..2....0..0..0..0..0..6....0..0..0..0..0..3....0..0..0..0..0..1 %e A185430 ..0..0..0..0..0..6....0..0..0..0..1..2....0..0..0..0..0..6....0..0..0..0..0..4 %e A185430 ..0..0..0..0..1..2....0..0..0..0..1..5....0..0..0..0..2..3....0..0..0..0..0..4 %e A185430 ..0..0..0..0..1..4....0..0..0..0..2..2....0..0..0..0..3..6....0..0..0..0..7..3 %K A185430 nonn %O A185430 1,1 %A A185430 _R. H. Hardin_ Jan 27 2011