Positions of powers of 2 in A064413 (if it starts at 2).

Terms

a(0) =1a(1) =2a(2) =7a(3) =16a(4) =30a(5) =63a(6) =121a(7) =239a(8) =484a(9) =981a(10) =1960a(11) =3931a(12) =7897a(13) =15819a(14) =31728a(15) =63575a(16) =127353a(17) =255161a(18) =511013a(19) =1023397a(20) =2049131a(21) =4102600a(22) =8213243