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 A200853 #7 Jul 22 2025 15:58:35 %S A200853 42,647,8535,103528,1194898,13295014,144195756,1532754468,16036647028, %T A200853 165590166035,1691004116711,17103881636663,171555367761442, %U A200853 1708005328930678,16892696764660692,166083227626724726 %N A200853 Number of nX3 0..4 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200853 Column 3 of A200858 %H A200853 R. H. Hardin, <a href="/A200853/b200853.txt">Table of n, a(n) for n = 1..39</a> %e A200853 Some solutions for n=4 %e A200853 ..0..0..2....0..1..2....0..0..1....0..1..1....0..0..0....0..2..2....0..0..0 %e A200853 ..0..0..2....0..1..3....0..1..1....2..3..4....2..2..4....0..4..3....0..3..4 %e A200853 ..4..4..4....1..3..4....3..4..4....1..3..3....2..2..4....2..3..3....1..2..4 %e A200853 ..2..3..4....3..3..4....3..4..4....1..3..4....3..3..4....1..4..3....4..4..4 %K A200853 nonn %O A200853 1,1 %A A200853 _R. H. Hardin_ Nov 23 2011