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 A200970 #7 Jul 22 2025 16:02:19 %S A200970 388,37254,3167295,250149820,18714498069,1342587653727,93360032845673, %T A200970 6335655315992974,421865904772827987,27660730981017838471, %U A200970 1790599737428642496028,114654496418709581646953 %N A200970 Number of nX4 0..6 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200970 Column 4 of A200974 %H A200970 R. H. Hardin, <a href="/A200970/b200970.txt">Table of n, a(n) for n = 1..13</a> %e A200970 Some solutions for n=3 %e A200970 ..0..0..1..5....0..0..0..1....0..0..0..1....0..0..0..1....0..0..2..4 %e A200970 ..0..1..1..5....0..1..2..6....0..1..2..5....0..0..3..5....0..0..2..4 %e A200970 ..0..3..3..6....2..6..4..5....1..2..3..3....0..5..3..4....0..0..3..6 %K A200970 nonn %O A200970 1,1 %A A200970 _R. H. Hardin_ Nov 25 2011