Number of refactorable numbers (A033950) <= 10^n.
A111291
Number of refactorable numbers (A033950) <= 10^n.
Terms
- a(0) =1a(1) =4a(2) =16a(3) =92a(4) =665a(5) =5257a(6) =44705a(7) =394240a(8) =3558181a(9) =32608999a(10) =302172507a(11) =2823898245
External references
- oeis: A111291