Initial members of prime triples p < q < r such that r-q = n*(q-p).

Terms

a(0) =3a(1) =2a(2) =29a(3) =8117a(4) =137a(5) =197a(6) =45433a(7) =1931a(8) =521a(9) =156151a(10) =1949a(11) =1667a(12) =480203a(13) =2969a(14) =7757a(15) =2181731a(16) =12161a(17) =28349a(18) =6012893a(19) =20807a(20) =16139a(21) =3933593a(22) =163061a(23) =86627a(24) =13626251a(25) =25469a(26) =40637a(27) =60487753a(28) =79697a(29) =149627