a(n) is Gray-coded into n.

Terms

a(0) =0a(1) =1a(2) =3a(3) =2a(4) =7a(5) =6a(6) =4a(7) =5a(8) =15a(9) =14a(10) =12a(11) =13a(12) =8a(13) =9a(14) =11a(15) =10a(16) =31a(17) =30a(18) =28a(19) =29a(20) =24a(21) =25a(22) =27a(23) =26a(24) =16a(25) =17a(26) =19a(27) =18a(28) =23a(29) =22