Composite but smallest prime factor >= 17.

Terms

a(0) =289a(1) =323a(2) =361a(3) =391a(4) =437a(5) =493a(6) =527a(7) =529a(8) =551a(9) =589a(10) =629a(11) =667a(12) =697a(13) =703a(14) =713a(15) =731a(16) =779a(17) =799a(18) =817a(19) =841a(20) =851a(21) =893a(22) =899a(23) =901a(24) =943a(25) =961a(26) =989a(27) =1003a(28) =1007a(29) =1037