Number of iterations required for the sum of n and its prime divisors = t to reach a prime (where t replaces n in each iteration) in A016837.

A018845

Number of iterations required for the sum of n and its prime divisors = t to reach a prime (where t replaces n in each iteration) in A016837.

Terms

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

External references