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%I #3 Nov 18 2014 05:42:47
%S 32,480,1152,14452,119004,1357424,14866258,166783380,1809575752
%N Number of length n+2 0..7 arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero
%C Column 7 of A250320
%e Some solutions for n=5
%e ..6....3....2....3....2....7....6....0....1....5....0....4....7....3....3....6
%e ..4....3....6....3....2....6....7....4....1....2....5....1....3....3....7....2
%e ..3....6....4....2....5....6....5....3....2....2....1....3....1....3....0....5
%e ..2....0....4....2....3....7....4....4....0....0....6....0....2....2....5....1
%e ..2....3....0....4....4....7....7....6....6....0....6....2....1....5....6....5
%e ..1....1....7....6....2....5....7....4....3....4....2....0....1....4....4....0
%e ..1....3....1....6....4....2....6....4....3....7....1....1....5....4....6....4
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 18 2014
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