Smallest sequence which lists the position of digits "3" in the sequence.

Terms

a(0) =2a(1) =3a(2) =30a(3) =40a(4) =41a(5) =42a(6) =44a(7) =45a(8) =46a(9) =47a(10) =48a(11) =49a(12) =50a(13) =51a(14) =52a(15) =53a(16) =54a(17) =55a(18) =56a(19) =57a(20) =63a(21) =330a(22) =333a(23) =3333a(24) =33333a(25) =33400a(26) =40300a(27) =40400a(28) =40401a(29) =40402