Partial sums up to 10^n of A007425.

A180365

Partial sums up to 10^n of A007425.

Terms

    a(0) =1a(1) =53a(2) =1471a(3) =29425a(4) =496623a(5) =7518850a(6) =106030594a(7) =1421760251a(8) =18362473634a(9) =230375375227

External references