Position of n-th 1 in A031067.

Terms

a(0) =1a(1) =5a(2) =7a(3) =15a(4) =17a(5) =23a(6) =26a(7) =27a(8) =28a(9) =31a(10) =43a(11) =45a(12) =48a(13) =50a(14) =67a(15) =68a(16) =79a(17) =85a(18) =92a(19) =93a(20) =99a(21) =107a(22) =109a(23) =114a(24) =120a(25) =128a(26) =146a(27) =150a(28) =151a(29) =160