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Number of nondecreasing arrangements of n numbers x(i) in -(n+3)..(n+3) with the sum of sign(x(i))*2^|x(i)| zero
1

%I #8 May 17 2023 05:04:13

%S 0,5,11,39,144,467,1673,5825,20404,72246,255137,905611,3220635,

%T 11472797,40956011,146412581,524169045,1878990744,6743276222,

%U 24225861208,87117117408,313552816720,1129460906243,4071526431770,14687417557462,53016891233217,191489301052386,692020548649474,2502200138127277,9051895373199102,32761105883346693

%N Number of nondecreasing arrangements of n numbers x(i) in -(n+3)..(n+3) with the sum of sign(x(i))*2^|x(i)| zero

%C Column 5 of A187988

%e All solutions for n=3

%e .-5...-6...-1...-2...-4...-4...-1...-3...-5...-3...-2

%e .-5....5...-1...-2...-4....3....0....2....4...-3....1

%e ..6....5....2....3....5....3....0....2....4....4....1

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 18 2011

%E Terms from a(16) on by _R. J. Mathar_, May 17 2023