exp( Sum_{n>=1} A226561(n)*x^n/n ), where A226561(n) = Sum_{d|n} d^n*phi(d).
A226560
exp( Sum_{n>=1} A226561(n)*x^n/n ), where A226561(n) = Sum_{d|n} d^n*phi(d).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =21a(4) =155a(5) =2691a(6) =18924a(7) =732230a(8) =9223166a(9) =269544904a(10) =4308339664a(11) =264486350330
External references
- oeis: A226560