Positions of even numbers in A024975.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =8a(5) =10a(6) =12a(7) =15a(8) =17a(9) =19a(10) =20a(11) =22a(12) =24a(13) =26a(14) =28a(15) =31a(16) =32a(17) =34a(18) =37a(19) =38a(20) =41a(21) =43a(22) =44a(23) =47a(24) =48a(25) =51a(26) =52a(27) =53a(28) =55a(29) =58