L.g.f.: Sum_{n>=1} (x^n/n) / Product_{d|n} (1 - d*x^(n/d))^d.
A205487
L.g.f.: Sum_{n>=1} (x^n/n) / Product_{d|n} (1 - d*x^(n/d))^d.
Terms
- a(0) =1a(1) =3a(2) =10a(3) =43a(4) =206a(5) =1104a(6) =6581a(7) =43227a(8) =307927a(9) =2351288a(10) =19124238a(11) =165102052a(12) =1507907818a(13) =14512524085a(14) =146581677005
External references
- oeis: A205487