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 A200529 #7 Jul 22 2025 15:50:57 %S A200529 11,57,243,905,3135,10292,32556,100065,300847,888587,2586994,7441963, %T A200529 21193523,59838942,167704775,466986683,1293018711,3562315723, %U A200529 9770764284,26693067952,72663897633,197170483178,533459459628,1439508706370 %N A200529 Number of nX3 0..2 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200529 Column 3 of A200534 %H A200529 R. H. Hardin, <a href="/A200529/b200529.txt">Table of n, a(n) for n = 1..122</a> %e A200529 Some solutions for n=4 %e A200529 ..0..0..0....0..0..2....0..2..1....0..0..0....0..0..0....0..0..0....0..0..2 %e A200529 ..0..0..0....2..2..2....0..2..1....0..0..0....0..1..1....0..1..1....0..1..2 %e A200529 ..0..2..2....2..2..2....1..2..2....0..0..0....0..1..2....0..2..1....0..2..2 %e A200529 ..2..2..2....2..2..2....1..2..2....0..1..1....1..2..2....1..1..2....0..2..2 %K A200529 nonn %O A200529 1,1 %A A200529 _R. H. Hardin_ Nov 18 2011