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%I #6 Mar 31 2012 12:36:38
%S 1,4,6,14,24,54,104,230,464,1028,2128,4720,9918,22038,46760,104056,
%T 222338,495358,1064138,2373070,5119796,11425974,24738074,55242788,
%U 119958510,268018844,583462384,1304179214,2845288284,6362293924
%N Number of -2..2 arrays x(0..n-1) of n elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing
%C Column 2 of A200192
%H R. H. Hardin, <a href="/A200186/b200186.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for n=5
%e .-2....0...-2....0...-1....2....2...-2...-1...-1...-2....1....1....2...-1....0
%e ..1....2....2...-2....2...-2...-2....2....2....1....2...-1...-2...-1....2....2
%e .-1...-2...-1....2...-1....2....0...-2...-1...-1....0....2....1....1...-2...-1
%e ..2....1....2...-2....1...-2...-2....2....2....2....2...-2...-1...-2....2....1
%e ..0...-1...-1....2...-1....0....2....0...-2...-1...-2....0....1....0...-1...-2
%K nonn
%O 1,2
%A _R. H. Hardin_ Nov 14 2011
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