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A201068 Number of nX4 0..6 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

%I A201068 #7 Jul 22 2025 16:04:36
%S A201068 35,77,2611,22440,43308,1127514,175865,20393189,14766300,158314010,
%T A201068 495900141,452698962,6176064188,493804760,39573007249,18657025428,
%U A201068 128820947525,280570465208,193035367346,1994641001437,119475251989
%N A201068 Number of nX4 0..6 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
%C A201068 Column 4 of A201072
%H A201068 R. H. Hardin, <a href="/A201068/b201068.txt">Table of n, a(n) for n = 1..33</a>
%e A201068 Some solutions for n=5
%e A201068 ..0..1..3..4....0..0..1..2....0..0..2..3....0..1..1..3....0..0..2..3
%e A201068 ..0..2..3..4....0..1..3..4....0..2..3..5....0..2..2..3....0..1..3..4
%e A201068 ..1..2..4..5....1..2..4..5....1..2..4..5....0..4..5..5....1..2..3..5
%e A201068 ..1..2..5..6....2..3..4..5....1..3..4..5....1..4..5..6....1..4..4..6
%e A201068 ..3..5..6..6....3..6..6..6....1..6..6..6....2..4..6..6....5..5..6..6
%K A201068 nonn
%O A201068 1,1
%A A201068 _R. H. Hardin_ Nov 26 2011