Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero.

A188210

Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero.

Terms

    a(0) =1a(1) =9a(2) =50a(3) =318a(4) =1944a(5) =11963a(6) =73316a(7) =450096a(8) =2767118a(9) =17052653a(10) =105356398a(11) =652694106a(12) =4054512228a(13) =25254176312a(14) =157709971144a(15) =987358943331

External references