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%I #4 Mar 31 2012 12:36:37
%S 0,8,28,218,1074,7384,41228,262004,1565836,9730070,59336930,368674288
%N Number of -4..4 arrays x(0..n-1) of n elements with sum zero and with zeroth through n-1st differences all nonzero
%C Column 4 of A200038
%e Some solutions for n=6
%e ..4...-4....2....3....4....2....2...-1...-3....1....4....3...-2...-3....4....4
%e ..2...-2...-3....1....2....4...-1...-3....4...-3...-3...-2....3...-2...-4...-1
%e ..3....4....1....3...-3...-4....4....4....3....2...-4...-1...-4...-3...-1...-4
%e .-3....1...-2...-2....3....1...-3...-4...-4...-4....4....4...-1....3....4....3
%e .-4....2....3...-3...-2...-2....1....1...-2....1....3...-1....3....1...-2....1
%e .-2...-1...-1...-2...-4...-1...-3....3....2....3...-4...-3....1....4...-1...-3
%K nonn
%O 1,2
%A _R. H. Hardin_ Nov 12 2011