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%I #5 Mar 31 2012 12:36:36
%S 1,12,126,1432,16682,197962,2378412,28844590,352355640,4329146404,
%T 53439881140,662256127274,8234161234932,102668802658902,
%U 1283270183281782,16074009129375488,201718956009659774,2535677513896048744
%N Number of -6..6 arrays x(0..n-1) of n elements with zero sum and no two consecutive zero elements
%C Column 6 of A199530
%H R. H. Hardin, <a href="/A199528/b199528.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for n=5
%e .-3...-3....3...-1...-2...-5...-4....4...-5....0...-3....2...-2....4....4....5
%e ..1....1....4...-1....3...-1....3...-1...-2...-2....2....3....3....1...-1...-3
%e ..1....5...-3....2...-5....0...-2...-2....0....4...-6...-5...-3....0....4....1
%e .-5....2....0....1....1....5....6...-3....6...-3....4...-3....1...-4...-5....0
%e ..6...-5...-4...-1....3....1...-3....2....1....1....3....3....1...-1...-2...-3
%K nonn
%O 1,2
%A _R. H. Hardin_ Nov 07 2011
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