Numbers k such that k and k+1 each have at least 4 distinct prime factors.

Terms

a(0) =7314a(1) =8294a(2) =8645a(3) =9009a(4) =10659a(5) =11570a(6) =11780a(7) =11934a(8) =13299a(9) =13629a(10) =13845a(11) =14420a(12) =15105a(13) =15554a(14) =16554a(15) =16835a(16) =17204a(17) =17390a(18) =17654a(19) =17765a(20) =18095a(21) =18290a(22) =18444a(23) =18920a(24) =19005a(25) =19019a(26) =19095a(27) =19227a(28) =20349a(29) =20405