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 A185433 #7 Jul 22 2025 09:46:44 %S A185433 1216284173329482,745543958045415621,223694029250999654095, %T A185433 42451419931252675522287,5686283998453160141912882, %U A185433 573443108636317829849582612,45497009931939204350899288292 %N A185433 Number of (n+2)X9 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order. %C A185433 Column 7 of A185435 %H A185433 R. H. Hardin, <a href="/A185433/b185433.txt">Table of n, a(n) for n = 1..10</a> %e A185433 Some solutions for 4X9 %e A185433 ..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..1..1 %e A185433 ..0..0..0..0..0..0..0..1..3....0..0..0..0..0..0..0..1..7 %e A185433 ..0..0..0..0..0..0..0..1..7....0..0..0..0..0..0..0..4..0 %e A185433 ..0..0..0..0..0..0..0..6..7....0..0..0..0..0..0..0..4..5 %K A185433 nonn %O A185433 1,1 %A A185433 _R. H. Hardin_ Jan 27 2011