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 A200531 #7 Jul 22 2025 15:51:11 %S A200531 32,354,3135,23925,167171,1092645,6820330,41135050,241717185, %T A200531 1391776867,7886862976,44130194797,244429190692,1342743707709, %U A200531 7326819179875,39759798789392,214782513374737,1155893422272121,6201199013944784 %N A200531 Number of nX5 0..2 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200531 Column 5 of A200534 %H A200531 R. H. Hardin, <a href="/A200531/b200531.txt">Table of n, a(n) for n = 1..36</a> %e A200531 Some solutions for n=4 %e A200531 ..0..0..0..0..2....0..0..0..0..1....0..0..2..1..1....0..0..0..0..2 %e A200531 ..0..0..0..2..2....0..0..0..1..1....0..1..2..1..1....0..0..1..1..2 %e A200531 ..0..0..2..2..2....1..2..2..2..2....0..1..2..2..2....0..1..2..2..2 %e A200531 ..1..2..2..2..2....1..1..2..2..2....1..1..2..2..2....1..2..2..2..2 %K A200531 nonn %O A200531 1,1 %A A200531 _R. H. Hardin_ Nov 18 2011