cp's OEIS Frontend

A188209 Number of nondecreasing arrangements of n numbers in -(n+5)..(n+5) with sum zero.

%I A188209 #7 Jul 22 2025 11:02:57
%S A188209 1,8,41,241,1394,8196,48417,288100,1724882,10388788,62914457,
%T A188209 382957903,2342043630,14385595262,88716792134,549159544833,
%U A188209 3411043554787,21255166581480,132841213701954,832537685724170,5231154448179004
%N A188209 Number of nondecreasing arrangements of n numbers in -(n+5)..(n+5) with sum zero.
%C A188209 Column 7 of A188211
%H A188209 R. H. Hardin, <a href="/A188209/b188209.txt">Table of n, a(n) for n = 1..26</a>
%e A188209 Some solutions for n=3
%e A188209 .-5...-4...-8...-1...-5...-8...-4...-7...-4...-8...-7...-5...-7...-3...-5...-3
%e A188209 ..0...-3....2...-1...-3....1....0....0....2....0....3....1...-1...-1...-2....0
%e A188209 ..5....7....6....2....8....7....4....7....2....8....4....4....8....4....7....3
%K A188209 nonn
%O A188209 1,2
%A A188209 _R. H. Hardin_ Mar 24 2011