Lucky numbers ending with digit 1.

Terms

a(0) =1a(1) =21a(2) =31a(3) =51a(4) =111a(5) =141a(6) =151a(7) =171a(8) =201a(9) =211a(10) =231a(11) =241a(12) =261a(13) =321a(14) =331a(15) =361a(16) =391a(17) =421a(18) =451a(19) =511a(20) =541a(21) =591a(22) =601a(23) =621a(24) =631a(25) =651a(26) =741a(27) =781a(28) =801a(29) =831