G.f.: A(x) = exp( Sum_{n>=1} sigma(n)*L(n)*x^n/n ) where Sum_{n>=1} L(n)*x^n/n = log(1+x*A(x)).
A158107
G.f.: A(x) = exp( Sum_{n>=1} sigma(n)*L(n)*x^n/n ) where Sum_{n>=1} L(n)*x^n/n = log(1+x*A(x)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =7a(4) =44a(5) =272a(6) =3053a(7) =25670a(8) =368728a(9) =4867442a(10) =86339238a(11) =1071067999a(12) =28751805809a(13) =417861397848
External references
- oeis: A158107