Number of divisors of n equals the average of distinct prime factors of n.

Terms

a(0) =2a(1) =9a(2) =15a(3) =114a(4) =170a(5) =175a(6) =245a(7) =351a(8) =372a(9) =558a(10) =580a(11) =625a(12) =1012a(13) =1032a(14) =1375a(15) =1377a(16) =1450a(17) =1640a(18) =2322a(19) =3944a(20) =4225a(21) =4240a(22) =4700a(23) =4824a(24) =5566a(25) =5766a(26) =5929a(27) =6432a(28) =6591a(29) =6655