Starting with n, repeatedly calculate the sum of prime factors (with repetition) of the previous term, until reaching 0 or a fixed point: a(n) is the number of terms in the resulting sequence.
A002217
Starting with n, repeatedly calculate the sum of prime factors (with repetition) of the previous term, until reaching 0 or a fixed point: a(n) is the number of terms in the resulting sequence.
Terms
- a(0) =2a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =3a(8) =3a(9) =2a(10) =1a(11) =2a(12) =1a(13) =4a(14) =4a(15) =4a(16) =1a(17) =4a(18) =1a(19) =4a(20) =3a(21) =2a(22) =1a(23) =4a(24) =3a(25) =5a(26) =4a(27) =2a(28) =1a(29) =3
External references
- oeis: A002217