cp's OEIS Frontend

A188235 Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero and not more than two numbers equal.

%I A188235 #7 Jul 22 2025 11:04:14
%S A188235 1,9,49,311,1852,10994,64370,374820,2171675,12546170,72337436,
%T A188235 416605786,2397909069,13799639040,79425097850,457295766838,
%U A188235 2634229243277,15183632033377,87578564420013,505526226244917,2920309324204918
%N A188235 Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero and not more than two numbers equal.
%C A188235 Column 8 of A188236
%H A188235 R. H. Hardin, <a href="/A188235/b188235.txt">Table of n, a(n) for n = 1..25</a>
%e A188235 Some solutions for n=4
%e A188235 -10...-7...-7...-8...-4...-9...-6...-4...-5...-9...-7...-6...-8...-4...-6...-7
%e A188235 .-7...-5...-6...-5...-1...-3...-6...-2...-3...-3...-5...-6....0...-3...-2....2
%e A188235 ..7....4....4....3....1....3....3....0....1....6....2....2....0...-2...-1....2
%e A188235 .10....8....9...10....4....9....9....6....7....6...10...10....8....9....9....3
%K A188235 nonn
%O A188235 1,2
%A A188235 _R. H. Hardin_ Mar 24 2011