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%I #3 Nov 18 2014 05:41:51
%S 18,200,436,3916,24126,197848,1559080,12424332,95711098,709795516,
%T 5002719434,33563203028
%N Number of length n+2 0..5 arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero
%C Column 5 of A250320
%e Some solutions for n=6
%e ..2....0....1....1....3....4....1....2....3....3....1....5....1....1....0....0
%e ..3....3....1....1....3....0....0....0....0....0....1....3....1....0....0....4
%e ..2....3....3....0....2....4....4....4....1....2....1....3....0....2....4....3
%e ..3....5....1....3....4....2....5....5....5....3....3....0....3....5....4....4
%e ..1....0....5....3....3....2....0....0....4....1....1....2....5....3....0....3
%e ..1....1....5....1....0....3....0....1....2....3....2....0....4....4....4....5
%e ..2....4....2....1....0....1....2....4....0....4....5....0....3....3....5....2
%e ..1....5....2....5....2....3....3....0....5....5....3....0....5....0....1....2
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 18 2014
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