A187135 - OEIS

%I #5 Mar 31 2012 12:36:07

%S 3249,182214,5755698,201302208,7020258336,245891941002,8616423081600,

%T 301728175130790,10570455159698376,370183320491626512,

%U 12967430068901756304,454182945213312573174,15908967753084162698652

%N Number of (n+1)X5 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces

%C Column 4 of A187140

%H R. H. Hardin, <a href="/A187135/b187135.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 4X5

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 05 2011