Numbers of the form p*q, p and q prime with q=2p-3.

Terms

a(0) =9a(1) =35a(2) =77a(3) =209a(4) =299a(5) =527a(6) =989a(7) =1829a(8) =2627a(9) =3239a(10) =3569a(11) =5459a(12) =8777a(13) =9869a(14) =13529a(15) =18527a(16) =20099a(17) =22577a(18) =25199a(19) =31877a(20) =37127a(21) =48827a(22) =55277a(23) =64979a(24) =72389a(25) =73919a(26) =88409a(27) =98789a(28) =107879a(29) =115439