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A201212 Number of nX4 0..3 arrays with every row and column running average nondecreasing rightwards and downwards.

%I A201212 #7 Jul 22 2025 16:09:21
%S A201212 51,867,11932,146946,1692945,18624423,198262359,2055746385,
%T A201212 20869314255,208139081237,2045065967111,19837690800848,
%U A201212 190312987378848,1808321481842796,17039496826295448,159395007901738133
%N A201212 Number of nX4 0..3 arrays with every row and column running average nondecreasing rightwards and downwards.
%C A201212 Column 4 of A201216
%H A201212 R. H. Hardin, <a href="/A201212/b201212.txt">Table of n, a(n) for n = 1..29</a>
%e A201212 Some solutions for n=3
%e A201212 ..0..0..0..0....0..0..0..3....0..0..3..2....0..0..2..2....0..0..0..0
%e A201212 ..0..3..2..2....0..0..3..3....1..2..3..2....0..2..3..2....0..3..3..2
%e A201212 ..2..2..3..3....1..3..3..3....1..1..3..2....2..3..3..3....1..2..2..2
%K A201212 nonn
%O A201212 1,1
%A A201212 _R. H. Hardin_ Nov 28 2011