cp's OEIS Frontend

A188210 Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero.

%I A188210 #7 Jul 22 2025 11:03:04
%S A188210 1,9,50,318,1944,11963,73316,450096,2767118,17052653,105356398,
%T A188210 652694106,4054512228,25254176312,157709971144,987358943331,
%U A188210 6196330627807,38975339759358,245693231541360,1552021349807456,9823321416340666
%N A188210 Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero.
%C A188210 Column 8 of A188211
%H A188210 R. H. Hardin, <a href="/A188210/b188210.txt">Table of n, a(n) for n = 1..25</a>
%e A188210 Some solutions for n=3
%e A188210 .-3...-7...-4...-5...-2...-4...-5...-9...-8...-9...-6...-3...-4...-7...-3...-6
%e A188210 .-3....0...-3...-2...-2....1...-4....2....1....3....2...-1...-1....1....1....1
%e A188210 ..6....7....7....7....4....3....9....7....7....6....4....4....5....6....2....5
%K A188210 nonn
%O A188210 1,2
%A A188210 _R. H. Hardin_ Mar 24 2011