Position of n-th 3 in A030548.

Terms

a(0) =3a(1) =13a(2) =25a(3) =30a(4) =32a(5) =34a(6) =36a(7) =37a(8) =38a(9) =40a(10) =49a(11) =61a(12) =77a(13) =95a(14) =113a(15) =121a(16) =124a(17) =127a(18) =130a(19) =131a(20) =133a(21) =136a(22) =149a(23) =167a(24) =185a(25) =203a(26) =221a(27) =229a(28) =232a(29) =235