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A188207 Number of nondecreasing arrangements of n numbers in -(n+3)..(n+3) with sum zero.

%I A188207 #7 Jul 22 2025 11:02:44
%S A188207 1,6,25,126,649,3486,19138,107233,610358,3521260,20547836,121095602,
%T A188207 719833595,4311542748,25999063108,157723186593,962014388419,
%U A188207 5896435229442,36301479759571,224396764731302,1392253538833522
%N A188207 Number of nondecreasing arrangements of n numbers in -(n+3)..(n+3) with sum zero.
%C A188207 Column 5 of A188211
%H A188207 R. H. Hardin, <a href="/A188207/b188207.txt">Table of n, a(n) for n = 1..24</a>
%e A188207 Some solutions for n=3
%e A188207 .-5....0...-4...-3...-3...-2...-6...-3...-3...-2...-4...-2...-2...-3...-5...-1
%e A188207 ..1....0....2....0...-2....1....1...-3....1....0...-1...-1...-2...-1...-1...-1
%e A188207 ..4....0....2....3....5....1....5....6....2....2....5....3....4....4....6....2
%K A188207 nonn
%O A188207 1,2
%A A188207 _R. H. Hardin_ Mar 24 2011