The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #3 Nov 16 2014 07:00:24
%S 8,88,288,3156,25964,281552,2908232,30143732,301550620,2901853512,
%T 26702134812,235590646376
%N Number of length n+1 0..7 arrays with the sum of the squares of adjacent differences multiplied by some arrangement of +-1 equal to zero
%C Column 7 of A250277
%e Some solutions for n=5
%e ..6....5....7....7....0....3....2....5....0....7....0....1....5....6....6....6
%e ..4....4....1....0....5....7....3....2....2....3....0....5....2....7....3....4
%e ..6....1....6....0....3....2....5....2....1....6....6....1....6....7....7....0
%e ..7....1....6....7....1....4....5....5....1....4....0....3....1....4....3....3
%e ..4....4....1....6....0....5....3....2....2....3....3....5....5....1....3....2
%e ..4....5....7....5....4....7....4....5....4....1....6....5....1....2....6....4
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 16 2014