Interprimes which are of the form s*prime, s=9.

Terms

a(0) =18a(1) =45a(2) =99a(3) =279a(4) =747a(5) =909a(6) =1611a(7) =1737a(8) =2007a(9) =2259a(10) =2439a(11) =2799a(12) =3879a(13) =5193a(14) =5571a(15) =5787a(16) =6147a(17) =6219a(18) =6471a(19) =6813a(20) =6849a(21) =7677a(22) =8271a(23) =8577a(24) =8703a(25) =8739a(26) =8793a(27) =9279a(28) =9549a(29) =9621