Successive prime factors of (3^1006003 - 3)/1006003^2.

Terms

a(0) =2a(1) =2a(2) =2a(3) =3a(4) =7a(5) =13a(6) =19a(7) =37a(8) =757a(9) =111779a(10) =670669a(11) =6371347a(12) =34204069a(13) =166437443a(14) =310854619a(15) =385634101a(16) =14188652209a(17) =42594124681