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 A200972 #6 Nov 17 2022 18:48:06 %S A200972 4874,3543465,2279060645,1342587653727,738228105542702 %N A200972 Number of n X 6 0..6 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200972 Column 6 of A200974. %e A200972 Some solutions for n=3 %e A200972 ..0..0..0..0..1..5....0..0..0..0..1..2....0..0..0..0..0..1....0..0..0..0..1..3 %e A200972 ..0..0..0..0..1..5....0..0..0..0..2..4....0..0..0..0..2..2....0..0..0..0..2..4 %e A200972 ..0..0..3..6..5..5....0..0..1..3..5..4....0..0..6..6..6..5....0..0..2..2..4..6 %Y A200972 Cf. A200974. %K A200972 nonn %O A200972 1,1 %A A200972 _R. H. Hardin_, Nov 25 2011