cp's OEIS Frontend

A188233 Number of nondecreasing arrangements of n numbers in -(n+4)..(n+4) with sum zero and not more than two numbers equal.

%I A188233 #7 Jul 22 2025 11:04:00
%S A188233 1,7,31,172,903,4859,26123,141519,769915,4209720,23118268,127495912,
%T A188233 705885128,3922515554,21871461990,122341995397,686381562245,
%U A188233 3861568338064,21781724157952,123162942539680,698010289536681
%N A188233 Number of nondecreasing arrangements of n numbers in -(n+4)..(n+4) with sum zero and not more than two numbers equal.
%C A188233 Column 6 of A188236
%H A188233 R. H. Hardin, <a href="/A188233/b188233.txt">Table of n, a(n) for n = 1..27</a>
%e A188233 Some solutions for n=4
%e A188233 .-7...-3...-4...-6...-5...-7...-3...-4...-8...-8...-3...-6...-7...-8...-8...-6
%e A188233 .-5...-1...-2...-2...-5....1...-3...-4...-3...-3...-2....0...-4...-5...-6...-5
%e A188233 ..5....1....1....1....4....2....1....0....3....5....2....0....4....6....7....4
%e A188233 ..7....3....5....7....6....4....5....8....8....6....3....6....7....7....7....7
%K A188233 nonn
%O A188233 1,2
%A A188233 _R. H. Hardin_ Mar 24 2011