Number of nondecreasing arrangements of n nonzero numbers in -(n+4)..(n+4) with sum zero.

A188330

Number of nondecreasing arrangements of n nonzero numbers in -(n+4)..(n+4) with sum zero.

Terms

    a(0) =0a(1) =6a(2) =24a(3) =136a(4) =726a(5) =4050a(6) =22786a(7) =130453a(8) =755434a(9) =4423012a(10) =26136264a(11) =155721334a(12) =934541838a(13) =5644979312a(14) =34296099090a(15) =209459048259

External references