%I #5 Mar 31 2012 12:36:37
%S 102,1144,11384,124982,1402934,15805218,179213048,2044221894,
%T 23427591518,269528370904,3111004900884,36009192415678,
%U 417810425670462,4858093196583212,56593178356427376,660363780853262084
%N Number of -6..6 arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero
%C Column 6 of A199832
%H R. H. Hardin, <a href="/A199830/b199830.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for n=3
%e ..0....3....6...-4....0...-6...-1....6...-1...-2...-3....0....1...-6...-2....4
%e .-2....5...-5...-6....3....3...-5....1....6....4....5...-6....0....3...-3...-3
%e ..1...-4...-5....3...-2...-2....2....0...-3...-5....6...-1...-4....0....0...-5
%e ..2...-4...-1....4...-1....5....1...-3....4...-1...-3....6....2....6....2....4
%e .-1....0....5....3....0....0....3...-4...-6....4...-5....1....1...-3....3....0
%K nonn
%O 1,1
%A _R. H. Hardin_ Nov 11 2011