Positions of odd numbers in A024412.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =7a(5) =8a(6) =10a(7) =12a(8) =13a(9) =14a(10) =15a(11) =19a(12) =20a(13) =22a(14) =25a(15) =26a(16) =29a(17) =30a(18) =31a(19) =35a(20) =36a(21) =38a(22) =41a(23) =43a(24) =45a(25) =47a(26) =48a(27) =51a(28) =52a(29) =56