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A201211 Number of n X 3 0..3 arrays with every row and column running average nondecreasing rightwards and downwards.

%I A201211 #7 Jan 20 2024 18:18:11
%S A201211 23,216,1684,11932,79739,512681,3216277,19817136,120478844,724707450,
%T A201211 4322688971,25608764387,150879112600,884928308606,5170909446013,
%U A201211 30121160018287,174998088275471,1014425257507861,5869059549460367
%N A201211 Number of n X 3 0..3 arrays with every row and column running average nondecreasing rightwards and downwards.
%C A201211 Column 3 of A201216.
%H A201211 R. H. Hardin, <a href="/A201211/b201211.txt">Table of n, a(n) for n = 1..51</a>
%e A201211 Some solutions for n=5
%e A201211 ..0..0..0....0..0..1....0..0..0....0..1..1....0..0..0....0..0..0....0..0..1
%e A201211 ..0..0..0....0..2..2....1..2..2....0..3..2....0..2..3....0..0..1....1..1..3
%e A201211 ..0..1..1....0..3..2....1..1..1....1..3..3....1..1..2....0..0..2....2..2..2
%e A201211 ..0..2..3....2..3..3....1..3..3....2..3..3....1..1..3....1..2..2....2..3..3
%e A201211 ..0..2..2....1..2..3....1..2..2....1..3..3....1..2..2....1..3..2....3..3..3
%Y A201211 Cf. A201216.
%K A201211 nonn
%O A201211 1,1
%A A201211 _R. H. Hardin_, Nov 28 2011