G.f.: A(x) = exp( Sum_{n>=1} [ Sum_{k>=1} sigma(n,k)*x^k ]^n/n ).
A159604
G.f.: A(x) = exp( Sum_{n>=1} [ Sum_{k>=1} sigma(n,k)*x^k ]^n/n ).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =43a(4) =856a(5) =10744a(6) =608375a(7) =14284223a(8) =551011548a(9) =19119025101a(10) =874788949035
External references
- oeis: A159604