G.f.: A(x) = exp( Sum_{n>=1} sigma(n)^(n-1) * x^n/n ).
A224439
G.f.: A(x) = exp( Sum_{n>=1} sigma(n)^(n-1) * x^n/n ).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =7a(4) =93a(5) =357a(6) =41927a(7) =80065a(8) =21483964a(9) =112388242a(10) =19973468103a(11) =25813956365
External references
- oeis: A224439