G.f.: exp( Sum_{n>=1} A226459(n)*x^n/n ), where A226459(n) = Sum_{d|n} phi(d^d).
A226458
G.f.: exp( Sum_{n>=1} A226459(n)*x^n/n ), where A226459(n) = Sum_{d|n} phi(d^d).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =8a(4) =41a(5) =547a(6) =3193a(7) =104733a(8) =1159483a(9) =29990445a(10) =431859113a(11) =24050995053a(12) =272382000003
External references
- oeis: A226458