Position of n-th 1 in A031235.

Terms

a(0) =1a(1) =6a(2) =7a(3) =8a(4) =10a(5) =12a(6) =14a(7) =17a(8) =27a(9) =37a(10) =47a(11) =48a(12) =50a(13) =53a(14) =56a(15) =59a(16) =61a(17) =62a(18) =63a(19) =64a(20) =65a(21) =67a(22) =68a(23) =70a(24) =71a(25) =73a(26) =74a(27) =77a(28) =78a(29) =80