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%I #3 Dec 15 2014 07:05:33
%S 8,1464,4680,79672,654644,6994984,59838132,513937352,4190189694,
%T 34020988396,273415166334,2193948803940
%N Number of length n+2 0..7 arrays with the sum of the maximum minus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero
%C Column 7 of A252177
%e Some solutions for n=4
%e ..0....6....4....2....1....7....3....0....6....7....3....2....1....0....3....2
%e ..0....0....0....6....5....0....1....0....4....3....6....0....4....1....7....5
%e ..5....0....7....2....1....4....6....0....6....4....4....3....2....3....4....1
%e ..6....1....5....6....4....1....1....5....5....3....7....2....3....0....6....6
%e ..4....3....7....5....1....6....6....7....6....3....1....5....6....6....1....6
%e ..3....2....7....2....4....0....5....5....3....1....7....4....3....6....0....0
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 15 2014