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%I #5 Mar 31 2012 12:36:36
%S 1,14,168,2212,29750,407946,5662636,79345982,1119873360,15897133212,
%T 226731289148,3246399497138,46636478912912,671855095655758,
%U 9702557118121642,140418234266554336,2035998107250999870
%N Number of -7..7 arrays x(0..n-1) of n elements with zero sum and no two consecutive zero elements
%C Column 7 of A199530
%H R. H. Hardin, <a href="/A199529/b199529.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for n=5
%e ..3...-6...-3....5...-1....1....0....4...-7...-6...-6...-6....4...-3...-3...-4
%e .-3....7....0...-5....2...-2...-1...-4....2....5....5...-3....1...-2...-2....4
%e .-3....3....7....2....5...-7....4...-3....7....6...-2....6...-4...-2....7....3
%e .-3...-5...-1...-5...-7....7....0...-1...-2...-3....0....4....2....5....5...-3
%e ..6....1...-3....3....1....1...-3....4....0...-2....3...-1...-3....2...-7....0
%K nonn
%O 1,2
%A _R. H. Hardin_ Nov 07 2011
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