Semiprimes in A003215.

Terms

a(0) =91a(1) =169a(2) =217a(3) =469a(4) =721a(5) =817a(6) =1027a(7) =1141a(8) =1261a(9) =1387a(10) =2611a(11) =2977a(12) =3781a(13) =3997a(14) =4681a(15) =5677a(16) =5941a(17) =6487a(18) =6769a(19) =7651a(20) =7957a(21) =8587a(22) =9577a(23) =10981a(24) =11347a(25) =12481a(26) =12871a(27) =14077a(28) =14491a(29) =15769