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 A200826 #9 Jul 22 2025 15:57:33 %S A200826 69,1630,33540,642953,11757774,207535740,3568229516,60064451704, %T A200826 994081203872,16221664901551,261576061692669,4174923985695564, %U A200826 66040940309213362,1036456712144381487,16152737625133763191 %N A200826 Number of nX3 0..5 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200826 Column 3 of A200831 %H A200826 R. H. Hardin, <a href="/A200826/b200826.txt">Table of n, a(n) for n = 1..32</a> %e A200826 Some solutions for n=4 %e A200826 ..0..0..0....0..0..0....0..0..1....0..0..0....0..0..1....0..0..0....0..0..1 %e A200826 ..0..1..2....0..2..3....0..1..1....0..1..2....0..1..3....0..0..0....0..2..3 %e A200826 ..0..4..2....2..2..5....0..3..3....0..2..1....2..3..4....1..5..5....3..3..5 %e A200826 ..1..3..5....3..5..4....3..3..4....2..5..5....3..5..5....1..3..3....3..3..5 %K A200826 nonn %O A200826 1,1 %A A200826 _R. H. Hardin_ Nov 23 2011