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%I #6 Dec 18 2015 18:18:05
%S 0,2,125,11879,3833954,4623938410,20901164219657,362655247706368404,
%T 23827622765333417390234
%N Number of n X n 1..2 arrays with every element value z a city block distance of exactly z from another element value z
%C Diagonal of A209610
%e Some solutions for n=4
%e ..1..1..1..2....2..1..1..1....2..1..1..1....2..1..1..1....1..2..1..1
%e ..2..2..1..1....1..1..1..1....2..2..2..2....2..1..2..2....1..2..1..2
%e ..1..2..2..2....2..2..1..2....2..1..1..2....2..1..2..2....1..2..2..2
%e ..1..2..1..1....2..2..2..2....2..2..1..2....2..2..2..2....1..1..1..2
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 10 2012