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 A200827 #9 Jul 22 2025 15:57:40 %S A200827 219,12776,642953,29830782,1307781737,54981059192,2243416408567, %T A200827 89423476817120,3499282820109344,134839582934045576, %U A200827 5128001888138908757,192784866403516517599,7173689814037090539114,264492224043213953480771 %N A200827 Number of nX4 0..5 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200827 Column 4 of A200831 %H A200827 R. H. Hardin, <a href="/A200827/b200827.txt">Table of n, a(n) for n = 1..15</a> %e A200827 Some solutions for n=3 %e A200827 ..0..0..1..1....0..0..3..1....0..0..5..2....0..0..0..0....0..0..0..0 %e A200827 ..0..0..1..1....0..2..4..3....0..1..5..3....0..2..1..4....0..1..2..3 %e A200827 ..3..3..3..5....4..4..4..5....1..5..5..4....1..3..5..5....2..2..5..4 %K A200827 nonn %O A200827 1,1 %A A200827 _R. H. Hardin_ Nov 23 2011