Indices of powers of 2 in A098550.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =14a(5) =29a(6) =65a(7) =137a(8) =277a(9) =546a(10) =1109a(11) =2208a(12) =4391a(13) =8746a(14) =17404a(15) =34662a(16) =69036a(17) =137604a(18) =274385a(19) =547278a(20) =1091962a(21) =2179171a(22) =4349905a(23) =8684545a(24) =17341369a(25) =34632301a(26) =69172557a(27) =138175535a(28) =276039015a(29) =551501773