cp's OEIS Frontend

A187985 Number of nondecreasing arrangements of n numbers x(i) in -(n+4)..(n+4) with the sum of sign(x(i))*2^|x(i)| zero.

%I A187985 #13 Jun 15 2025 16:07:29
%S A187985 0,6,13,49,181,597,2166,7592,26835,95590,339475,1211024,4324913,
%T A187985 15465952,55398468,198646230,713134270,2562757415,9218114300,
%U A187985 33185957425,119566240848,431102833455,1555423251527,5615525795887,20285623430206,73320521305274,265147098624058,959309368316993,3472389521265649
%N A187985 Number of nondecreasing arrangements of n numbers x(i) in -(n+4)..(n+4) with the sum of sign(x(i))*2^|x(i)| zero.
%e A187985 All solutions for n=3
%e A187985 .-7...-5...-2...-4...-3...-6...-2...-3...-1...-1...-6...-5...-4
%e A187985 ..6....4...-2...-4...-3...-6....1....2...-1....0....5...-5....3
%e A187985 ..6....4....3....5....4....7....1....2....2....0....5....6....3
%Y A187985 Column 6 of A187988.
%K A187985 nonn
%O A187985 1,2
%A A187985 _R. H. Hardin_, Mar 18 2011
%E A187985 Terms from a(14) on from _R. J. Mathar_, May 17 2023