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Number of (n+1)X3 0..3 arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant
1

%I #5 Mar 31 2012 12:36:04

%S 3516,158806,7232034,328811578,14927163064,678146728482,

%T 30800191295066,1399014564276542,63544539466260468,

%U 2886280358846258546,131098386145980056748,5954655860333220640992,270467958454465457232992

%N Number of (n+1)X3 0..3 arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant

%C Column 2 of A185923

%H R. H. Hardin, <a href="/A185920/b185920.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 5X3

%e ..0..1..2....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..2

%e ..2..0..2....2..0..2....2..0..2....2..0..2....2..0..1....2..0..1....2..0..2

%e ..0..1..1....3..1..0....1..1..1....1..1..2....3..1..2....2..1..0....2..1..3

%e ..3..2..1....3..3..1....2..0..3....2..0..1....2..2..0....3..3..2....1..2..1

%e ..3..0..2....3..3..2....2..2..3....3..2..0....0..0..3....0..2..1....3..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 06 2011