Composite numbers with smallest prime factor >= 7.

Terms

a(0) =49a(1) =77a(2) =91a(3) =119a(4) =121a(5) =133a(6) =143a(7) =161a(8) =169a(9) =187a(10) =203a(11) =209a(12) =217a(13) =221a(14) =247a(15) =253a(16) =259a(17) =287a(18) =289a(19) =299a(20) =301a(21) =319a(22) =323a(23) =329a(24) =341a(25) =343a(26) =361a(27) =371a(28) =377a(29) =391