a(n) = sum of distinct prime divisors of prime(n) + 1.

Terms

a(0) =3a(1) =2a(2) =5a(3) =2a(4) =5a(5) =9a(6) =5a(7) =7a(8) =5a(9) =10a(10) =2a(11) =21a(12) =12a(13) =13a(14) =5a(15) =5a(16) =10a(17) =33a(18) =19a(19) =5a(20) =39a(21) =7a(22) =12a(23) =10a(24) =9a(25) =22a(26) =15a(27) =5a(28) =18a(29) =24