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%I #5 Mar 31 2012 12:37:34
%S 53,1533,21379,142627,748627,3846906,23759000,197838865,1811137986,
%T 15107056679,115124207482,786166311691,5501528161561,40508050305846,
%U 318512137465444,2493337048435362,19390930320063991,143007988520740490
%N Number of nX3 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z
%C Column 3 of A210788
%H R. H. Hardin, <a href="/A210783/b210783.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..4..3..1....2..3..4....1..2..2....1..3..1....2..4..4....2..3..3....4..2..4
%e ..2..1..3....3..4..2....3..1..4....4..1..2....2..3..4....2..1..3....1..2..1
%e ..1..3..1....1..3..4....4..3..4....4..3..2....3..4..2....4..4..1....3..4..3
%e ..3..1..2....4..1..3....1..2..3....1..4..3....1..3..1....3..2..2....4..3..4
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 26 2012
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