Number of ways to choose a divisor of a divisor, both having distinct prime exponents, of the n-th superprimorial number A006939(n).
A336421
Number of ways to choose a divisor of a divisor, both having distinct prime exponents, of the n-th superprimorial number A006939(n).
Terms
- a(0) =1a(1) =3a(2) =13a(3) =76a(4) =571a(5) =5309a(6) =59341a(7) =780149
External references
- oeis: A336421