Nonprime numbers with smallest prime factor >= 13.

Terms

a(0) =169a(1) =221a(2) =247a(3) =289a(4) =299a(5) =323a(6) =361a(7) =377a(8) =391a(9) =403a(10) =437a(11) =481a(12) =493a(13) =527a(14) =529a(15) =533a(16) =551a(17) =559a(18) =589a(19) =611a(20) =629a(21) =667a(22) =689a(23) =697a(24) =703a(25) =713a(26) =731a(27) =767a(28) =779a(29) =793