Numbers having exactly two distinct prime factors p, q with q = p+6.

Terms

a(0) =55a(1) =91a(2) =187a(3) =247a(4) =275a(5) =391a(6) =605a(7) =637a(8) =667a(9) =1147a(10) =1183a(11) =1375a(12) =1591a(13) =1927a(14) =2057a(15) =2491a(16) =3025a(17) =3127a(18) =3179a(19) =3211a(20) =4087a(21) =4459a(22) =4693a(23) =4891a(24) =5767a(25) =6647a(26) =6655a(27) =6875a(28) =7387a(29) =8281