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%I #5 Mar 31 2012 12:37:34
%S 170,8824,142627,1115472,8039420,69751928,890122678,13542249784,
%T 192792997988,2360679608394,26209216760706,293049578829142,
%U 3503962366035752,44266390297992974,561080274874096444
%N Number of nX4 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z
%C Column 4 of A210788
%H R. H. Hardin, <a href="/A210784/b210784.txt">Table of n, a(n) for n = 1..132</a>
%e Some solutions for n=4
%e ..1..2..4..3....1..4..3..1....1..2..2..1....2..4..1..2....3..4..1..2
%e ..4..4..3..1....4..4..3..4....3..3..1..4....1..3..3..3....2..2..4..4
%e ..2..3..1..2....1..4..4..1....1..3..4..1....4..2..3..1....3..1..4..1
%e ..4..1..3..1....3..1..2..2....2..1..4..2....1..4..1..2....1..3..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 26 2012
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