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Number of nondecreasing arrangements of n numbers x(i) in -(n+6)..(n+6) with the sum of sign(x(i))*2^|x(i)| zero
0

%I #8 May 17 2023 08:21:10

%S 0,8,17,72,267,915,3407,12148,43820,158361,570132,2058621,7429283,

%T 26823311,96904923,350182773,1266059030,4579170527,16568732508,

%U 59974168593,217170088270,786671363225,2850611975840,10333040668513,37467797814236,135900958160905

%N Number of nondecreasing arrangements of n numbers x(i) in -(n+6)..(n+6) with the sum of sign(x(i))*2^|x(i)| zero

%C Column 8 of A187988

%e Some solutions for n=3

%e .-1...-7...-4...-7...-8...-3...-3...-5...-6...-6...-8...-5...-4...-2...-9...-1

%e ..0....6...-4...-7...-8...-3....2...-5...-6....5....7....4....3...-2....8...-1

%e ..0....6....5....8....9....4....2....6....7....5....7....4....3....3....8....2

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 18 2011

%E Terms beyond a(11) from _R. J. Mathar_, May 17 2023