a(n) = position of n-th 1 in A001285 or A010059 (Thue-Morse sequence).

Terms

a(0) =1a(1) =4a(2) =6a(3) =7a(4) =10a(5) =11a(6) =13a(7) =16a(8) =18a(9) =19a(10) =21a(11) =24a(12) =25a(13) =28a(14) =30a(15) =31a(16) =34a(17) =35a(18) =37a(19) =40a(20) =41a(21) =44a(22) =46a(23) =47a(24) =49a(25) =52a(26) =54a(27) =55a(28) =58a(29) =59