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 A200710 #6 Apr 28 2021 12:46:16 %S A200710 638,95567,12904303,1630978608,195675787426,22525604271509, %T A200710 2512851095363929,273566206900264111,29225435372492971841, %U A200710 3075465941063432826683,319691253286956006425052 %N A200710 Number of n X 4 0..7 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200710 Column 4 of A200713. %e A200710 Some solutions for n=3 %e A200710 ..0..0..0..0....0..0..0..0....0..0..1..1....0..0..0..1....0..0..1..1 %e A200710 ..0..4..2..3....1..1..3..3....0..0..1..1....0..2..1..1....0..0..3..2 %e A200710 ..0..3..4..3....1..3..3..5....5..6..6..7....2..2..2..5....1..3..2..4 %Y A200710 Cf. A200713. %K A200710 nonn %O A200710 1,1 %A A200710 _R. H. Hardin_ Nov 20 2011