Digit '1' concatenated with a(n) is a lucky number.

Terms

a(0) =3a(1) =5a(2) =11a(3) =15a(4) =27a(5) =29a(6) =33a(7) =35a(8) =41a(9) =51a(10) =59a(11) =63a(12) =69a(13) =71a(14) =89a(15) =93a(16) =95a(17) =101a(18) =105a(19) =107a(20) =117a(21) =123a(22) =147a(23) =155a(24) =167a(25) =179a(26) =183a(27) =189a(28) =197a(29) =201