Numbers n such that n, n+2, n+4, n+6 are semiprimes.

Terms

a(0) =213a(1) =215a(2) =299a(3) =411a(4) =1133a(5) =1135a(6) =1343a(7) =1345a(8) =1383a(9) =1385a(10) =1387a(11) =1685a(12) =1793a(13) =1835a(14) =1837a(15) =1891a(16) =1937a(17) =1939a(18) =1957a(19) =2045a(20) =2315a(21) =2317a(22) =2513a(23) =2567a(24) =2807a(25) =2809a(26) =2929a(27) =3091a(28) =3093a(29) =3095