Numbers k such that 2^k does not contain the digit 3 (probably finite).

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =6a(6) =7a(7) =8a(8) =9a(9) =10a(10) =11a(11) =12a(12) =13a(13) =18a(14) =19a(15) =20a(16) =21a(17) =24a(18) =26a(19) =32a(20) =34a(21) =38a(22) =40a(23) =44a(24) =48a(25) =50a(26) =53a(27) =57a(28) =60a(29) =80