Number of divisors d of the n-th superprimorial A006939(n) with distinct prime exponents such that the quotient A006939(n)/d also has distinct prime exponents.
A336419
Number of divisors d of the n-th superprimorial A006939(n) with distinct prime exponents such that the quotient A006939(n)/d also has distinct prime exponents.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =24a(5) =64a(6) =184a(7) =536a(8) =1608a(9) =5104a(10) =16448a(11) =55136a(12) =187136a(13) =658624a(14) =2339648a(15) =8618208a(16) =31884640a(17) =121733120a(18) =468209408a(19) =1849540416a(20) =7342849216
External references
- oeis: A336419