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Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order
1

%I #4 Feb 27 2013 16:52:40

%S 11,724,61757,5024944,411489189,33625853402,2757290901238,

%T 226934394962954,18748702054088170,1554468757231979806,

%U 129297779576953689571,10785833060389951147809,902060948747063990782774

%N Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order

%C Column 4 of A222654

%H R. H. Hardin, <a href="/A222653/b222653.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 27 2013