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 A200852 #7 Jul 22 2025 15:58:28 %S A200852 15,105,647,3728,20656,111222,586908,3047226,15620118,79228317, %T A200852 398364306,1988133262,9858922561,48617189158,238575216150, %U A200852 1165684780558,5673701149975,27520684819357,133080240201400,641746039540686 %N A200852 Number of nX2 0..4 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200852 Column 2 of A200858 %H A200852 R. H. Hardin, <a href="/A200852/b200852.txt">Table of n, a(n) for n = 1..140</a> %e A200852 Some solutions for n=3 %e A200852 ..1..3....0..1....0..0....0..3....0..3....0..0....0..1....0..2....1..1....0..0 %e A200852 ..1..4....0..1....2..3....0..3....2..3....1..4....0..3....2..2....3..3....1..4 %e A200852 ..4..4....0..1....3..4....3..3....4..4....1..3....3..4....2..4....3..4....4..4 %K A200852 nonn %O A200852 1,1 %A A200852 _R. H. Hardin_ Nov 23 2011