2^a(n) is the smallest power of 2 beginning with n.

Terms

a(0) =0a(1) =1a(2) =5a(3) =2a(4) =9a(5) =6a(6) =46a(7) =3a(8) =53a(9) =10a(10) =50a(11) =7a(12) =17a(13) =47a(14) =77a(15) =4a(16) =34a(17) =54a(18) =84a(19) =11a(20) =31a(21) =51a(22) =61a(23) =81a(24) =8a(25) =18a(26) =38a(27) =48a(28) =68a(29) =78