Numbers with largest and smallest prime factors differing by 6.

Terms

a(0) =55a(1) =91a(2) =187a(3) =247a(4) =275a(5) =385a(6) =391a(7) =605a(8) =637a(9) =667a(10) =1001a(11) =1147a(12) =1183a(13) =1375a(14) =1591a(15) =1925a(16) =1927a(17) =2057a(18) =2431a(19) =2491a(20) =2695a(21) =3025a(22) =3127a(23) =3179a(24) =3211a(25) =4087a(26) =4199a(27) =4235a(28) =4459a(29) =4693