%I #5 Mar 31 2012 12:36:11
%S 1,6,25,104,414,1636,6375,24591,94257,360002,1371535,5216252,19819846,
%T 75277670,285893124,1085984406,4126777398,15690144942,59691687518,
%U 227248928264,865788366806,3301087870766,12596381911969,48104063936789
%N Number of strictly increasing arrangements of n numbers in -(n+4)..(n+4) with sum zero
%C Column 6 of A188181
%H R. H. Hardin, <a href="/A188178/b188178.txt">Table of n, a(n) for n = 1..27</a>
%e Some solutions for n=5
%e .-7...-4...-9...-9...-8...-8...-6...-6...-7...-5...-7...-9...-5...-9...-9...-5
%e .-5...-2...-2...-6...-4...-6...-4...-5...-6...-3...-4...-1...-3...-5...-5...-4
%e ..0....0....2....3....1...-3...-2....0....0...-1...-3....0....0....2...-2....0
%e ..5....1....4....5....2....8....4....3....5....4....6....3....3....4....7....4
%e ..7....5....5....7....9....9....8....8....8....5....8....7....5....8....9....5
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 23 2011