a(n) = 4*A003714(n) + 1; the odd Fibbinary numbers.

Terms

a(0) =1a(1) =5a(2) =9a(3) =17a(4) =21a(5) =33a(6) =37a(7) =41a(8) =65a(9) =69a(10) =73a(11) =81a(12) =85a(13) =129a(14) =133a(15) =137a(16) =145a(17) =149a(18) =161a(19) =165a(20) =169a(21) =257a(22) =261a(23) =265a(24) =273a(25) =277a(26) =289a(27) =293a(28) =297a(29) =321