%I #5 Mar 31 2012 12:36:11
%S 0,1,2,10,40,197,980,5142,27632,152191,853564,4863492,28075992,
%T 163920550,966421928,5746596806,34428962746,207654949801,
%U 1259963104618,7686160299232,47116518171284,290105437233107,1793451033655758
%N Number of nondecreasing arrangements of n nonzero numbers in -(n-1)..(n-1) with sum zero
%C Column 1 of A188333
%H R. H. Hardin, <a href="/A188325/b188325.txt">Table of n, a(n) for n = 1..32</a>
%e Some solutions for n=6
%e .-5...-4...-5...-4...-4...-4...-5...-4...-4...-3...-5...-5...-5...-2...-5...-2
%e .-3...-2...-4...-2...-4...-2...-3...-2...-3...-2...-1...-4...-3...-2...-3...-2
%e .-1....1....1...-1...-1....1....2...-1....1...-1...-1...-4...-3...-2...-1...-2
%e ..1....1....2....2....1....1....2...-1....1...-1....1....3....1...-2....1...-1
%e ..3....2....2....2....3....1....2....3....1....3....2....5....5....4....4....2
%e ..5....2....4....3....5....3....2....5....4....4....4....5....5....4....4....5
%K nonn
%O 1,3
%A _R. H. Hardin_ Mar 28 2011