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%I #5 Mar 31 2012 12:36:44
%S 1,7,47,217,837,3067,11591,46521,189527,794867,3212411,13228131,
%T 54776691,227656973,950625037,3969330087,16629156327,69823182357,
%U 293680456429,1237245364673,5218020323041,22034867606649,93154330773015
%N Number of zero-sum -6..6 arrays of n elements with first through fourth differences also in -6..6
%C Column 6 of A201439
%H R. H. Hardin, <a href="/A201437/b201437.txt">Table of n, a(n) for n = 1..72</a>
%e Some solutions for n=8
%e ..2....2....2....0...-2...-3...-2....5...-3....0....1...-4...-1...-4...-5...-6
%e ..1...-2...-4....3...-1...-4....1....6....0...-3....6...-3....0...-1....1...-3
%e ..0...-2...-4....4...-1...-3....4....3....0...-6....5....1....0...-1....1....1
%e ..0....2...-2....2...-1...-2....5....0...-1...-4....2....4....0....0....0....3
%e ..0....4....1...-1...-1....1....3...-2...-1....2...-1....4....2....0....1....4
%e ..0....3....3...-4....0....3...-1...-4...-1....6...-3....2....2....1....2....3
%e .-1...-1....3...-4....1....3...-4...-6....1....5...-4...-2...-1....3....2....0
%e .-2...-6....1....0....5....5...-6...-2....5....0...-6...-2...-2....2...-2...-2
%K nonn
%O 1,2
%A _R. H. Hardin_ Dec 01 2011
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