A209392 - OEIS

%I #4 Mar 31 2012 12:37:28

%S 1,16,488,22416,978956,32651213,1094498759,36547403754

%N Number of nX3 1..4 arrays with every element value z a city block distance of exactly z from another element value z

%C Column 3 of A209394

%e Some solutions for n=4

%e ..2..3..3....3..3..3....3..2..4....2..4..2....1..3..2....3..3..2....2..1..1

%e ..1..2..4....3..3..3....3..1..1....4..1..1....1..2..3....3..3..2....2..2..1

%e ..1..3..3....3..1..1....4..2..1....1..1..2....3..2..3....2..2..2....2..1..1

%e ..4..3..3....3..1..1....3..3..2....1..2..4....3..2..2....3..3..3....2..2..2

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 07 2012