a(n) is the least k such that the base-2 representation of n begins at s(k) in A030324.

Terms

a(0) =1a(1) =2a(2) =1a(3) =9a(4) =2a(5) =1a(6) =4a(7) =9a(8) =37a(9) =17a(10) =2a(11) =8a(12) =1a(13) =4a(14) =31a(15) =44a(16) =9a(17) =41a(18) =37a(19) =51a(20) =17a(21) =6a(22) =2a(23) =8a(24) =36a(25) =16a(26) =1a(27) =60a(28) =4a(29) =31