Indices of terms in A352808 that are powers of 2.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =9a(5) =22a(6) =31a(7) =61a(8) =121a(9) =247a(10) =479a(11) =951a(12) =1862a(13) =3802a(14) =7431a(15) =15180a(16) =29723a(17) =59766a(18) =118893a(19) =239999a(20) =475573a(21) =959341a(22) =1902293a(23) =3835229a(24) =7609175a(25) =15268473a(26) =30436701a(27) =61001391