Number of divisors of n-th refactorable number (A033950(n)).

Terms

a(0) =1a(1) =2a(2) =4a(3) =3a(4) =6a(5) =6a(6) =8a(7) =9a(8) =8a(9) =8a(10) =12a(11) =12a(12) =10a(13) =12a(14) =8a(15) =12a(16) =8a(17) =12a(18) =8a(19) =12a(20) =8a(21) =8a(22) =12a(23) =18a(24) =8a(25) =12a(26) =9a(27) =12a(28) =8a(29) =20