Number of strings of n digits from 1...9 such that a signed summation of the digits exists making the sum = 0.

A288550

Number of strings of n digits from 1...9 such that a signed summation of the digits exists making the sum = 0.

Terms

    a(0) =1a(1) =0a(2) =9a(3) =108a(4) =1569a(5) =20230a(6) =229203a(7) =2278745a(8) =21214753a(9) =192899244a(10) =1741242069a(11) =15684465423a(12) =141196229849

External references