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 A185428 #8 Jul 22 2025 09:46:09 %S A185428 284037544,21536560306,1090205284029,41910604337378,1297535366114472, %T A185428 33575010264022917,745543958045415621,14492443009379677098, %U A185428 250496452202647761530,3898612401674733619729,55201391258522554476152 %N A185428 Number of (n+2)X4 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order. %C A185428 Column 2 of A185435 %H A185428 R. H. Hardin, <a href="/A185428/b185428.txt">Table of n, a(n) for n = 1..200</a> %H A185428 R. H. Hardin, <a href="/A185428/a185428.txt">Formula: polynomial of degree 126</a> %F A185428 Polynomial of degree 126, see link. %e A185428 Some solutions for 6X4 %e A185428 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A185428 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A185428 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A185428 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 %e A185428 ..0..1..5..7....0..0..6..6....0..1..5..5....0..0..6..7....0..1..4..6 %e A185428 ..7..4..2..7....0..5..1..4....4..3..2..6....2..5..3..3....1..5..0..3 %K A185428 nonn %O A185428 1,1 %A A185428 _R. H. Hardin_ Jan 27 2011