Position of n-th 1 in A031324.

Terms

a(0) =1a(1) =6a(2) =9a(3) =16a(4) =26a(5) =31a(6) =40a(7) =42a(8) =47a(9) =52a(10) =55a(11) =56a(12) =72a(13) =74a(14) =78a(15) =82a(16) =85a(17) =88a(18) =89a(19) =91a(20) =102a(21) =110a(22) =137a(23) =147a(24) =151a(25) =158a(26) =169a(27) =175a(28) =178a(29) =184