a(n) = sum of distinct prime divisors of 2*prime(n)-1.

Terms

a(0) =3a(1) =5a(2) =3a(3) =13a(4) =10a(5) =5a(6) =14a(7) =37a(8) =8a(9) =22a(10) =61a(11) =73a(12) =3a(13) =22a(14) =34a(15) =15a(16) =16a(17) =11a(18) =26a(19) =50a(20) =34a(21) =157a(22) =19a(23) =62a(24) =193a(25) =70a(26) =46a(27) =74a(28) =38a(29) =8