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%I #5 Mar 31 2012 12:36:38
%S 1,2,3,6,12,15,29,72,133,214,394,853,1782,3087,5597,11777,24069,45200,
%T 83805,167284,342971,664695,1257505,2476990,4999659,9864713,19023479,
%U 37228518,74480796,147868410,288747975,565957525,1124938149,2237002991
%N Number of -2..2 arrays x(0..n-1) of n elements with zero sum and no two consecutive declines, no adjacent equal elements, and no element more than one greater than the previous (random base sawtooth pattern)
%C Column 2 of A200181
%H R. H. Hardin, <a href="/A200175/b200175.txt">Table of n, a(n) for n = 1..200</a>
%e All solutions for n=6
%e ..1....2....1...-1....2....1...-2....0...-1....2....0....0....0....2....0
%e ..0...-2...-1....0....1...-1...-1...-1....0....0....1....1...-2....0....1
%e ..1...-1....0....1....2....0....0....0....1....1....2...-1...-1....1....2
%e .-1....0....1...-1...-2...-1....1....1....0...-2...-2....0....0...-1...-1
%e ..0....1...-1....0...-1....0....2....2....1...-1...-1....1....1....0....0
%e .-1....0....0....1...-2....1....0...-2...-1....0....0...-1....2...-2...-2
%K nonn
%O 1,2
%A _R. H. Hardin_ Nov 13 2011
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