cp's OEIS Frontend

A188330 Number of nondecreasing arrangements of n nonzero numbers in -(n+4)..(n+4) with sum zero.

%I A188330 #7 Jul 22 2025 11:08:08
%S A188330 0,6,24,136,726,4050,22786,130453,755434,4423012,26136264,155721334,
%T A188330 934541838,5644979312,34296099090,209459048259,1285320713656,
%U A188330 7921311099098,49011099602408,304342233975052,1896163114078450
%N A188330 Number of nondecreasing arrangements of n nonzero numbers in -(n+4)..(n+4) with sum zero.
%C A188330 Column 6 of A188333
%H A188330 R. H. Hardin, <a href="/A188330/b188330.txt">Table of n, a(n) for n = 1..27</a>
%e A188330 Some solutions for n=7
%e A188330 .-8...-8...-6...-6...-6...-5..-11..-11...-9..-10..-10..-11...-4..-10...-8...-6
%e A188330 .-7...-8...-4...-6...-3...-5...-8...-6...-8...-6...-9..-10...-4...-4...-8...-4
%e A188330 .-5...-6...-4...-3...-1...-5...-5...-4...-4...-3...-3...-8...-2...-4...-5...-3
%e A188330 ..2....2...-4...-1...-1...-2....3...-1....2...-3....2....6...-2....1....4...-3
%e A188330 ..5....5...-1....4....1....2....4....5....3....6....3....6...-2....2....5....4
%e A188330 ..6....6....8....5....1....5....7....6....6....7....8....7....7....4....6....4
%e A188330 ..7....9...11....7....9...10...10...11...10....9....9...10....7...11....6....8
%K A188330 nonn
%O A188330 1,2
%A A188330 _R. H. Hardin_ Mar 28 2011