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%I #5 Mar 31 2012 12:36:11
%S 1,6,24,121,598,3047,15696,81981,432491,2302608,12355260,66761159,
%T 362992938,1984748322,10907074884,60215001180,333824553431,
%U 1857784353244,10375296176688,58131888133855,326686361277196,1841007865239913
%N Number of nondecreasing arrangements of n numbers in -(n+3)..(n+3) with sum zero and not more than two numbers equal
%C Column 5 of A188236
%H R. H. Hardin, <a href="/A188232/b188232.txt">Table of n, a(n) for n = 1..28</a>
%e Some solutions for n=4
%e .-4...-5...-5...-5...-7...-6...-7...-5...-4...-2...-6...-7...-3...-4...-1...-6
%e ..0...-2....0...-3...-2....0...-6....1...-2....0...-6...-4...-3...-1...-1....1
%e ..0....2....0....4....3....3....6....1....2....1....5....5....0....1....1....2
%e ..4....5....5....4....6....3....7....3....4....1....7....6....6....4....1....3
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 24 2011
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