Exponential transform of A006125.

A197505

Exponential transform of A006125.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =15a(4) =121a(5) =1665a(6) =43883a(7) =2437423a(8) =289320049a(9) =71423435521

External references