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%I #4 Mar 31 2012 12:37:26
%S 1,2,16,152,1721,24255,353922,4498393,53903971
%N Number of nX2 1..6 arrays with every element value z a city block distance of exactly z from another element value z
%C Column 2 of A209058
%e Some solutions for n=6
%e ..3..5....5..3....5..2....2..3....1..3....6..3....3..2....2..3....4..1....4..4
%e ..4..4....5..2....2..2....2..2....1..3....1..1....4..3....5..2....4..1....3..1
%e ..1..1....2..2....3..2....3..2....1..3....3..3....2..2....3..3....1..1....4..1
%e ..3..1....2..3....2..2....1..1....3..3....1..1....3..1....2..2....1..4....2..3
%e ..5..4....1..5....2..5....2..2....1..3....3..1....2..1....3..3....1..4....4..4
%e ..4..4....1..5....3..2....3..2....1..3....3..6....4..1....2..5....1..1....2..4
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 04 2012