a(n) = [x^n] exp(Sum_{k>=1} sigma(k^n)*x^k/k).
A319363
a(n) = [x^n] exp(Sum_{k>=1} sigma(k^n)*x^k/k).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =21a(4) =296a(5) =5677a(6) =291348a(7) =22679763a(8) =3946629792
External references
- oeis: A319363
A319363
a(n) = [x^n] exp(Sum_{k>=1} sigma(k^n)*x^k/k).