Positions of powers of 2 in A064413.

Terms

a(0) =1a(1) =2a(2) =3a(3) =8a(4) =17a(5) =31a(6) =64a(7) =122a(8) =240a(9) =485a(10) =982a(11) =1961a(12) =3932a(13) =7898a(14) =15820a(15) =31729a(16) =63576a(17) =127354a(18) =255162a(19) =511014a(20) =1023398a(21) =2049132a(22) =4102601a(23) =8213244