Base -2 representation of -n reinterpreted as binary.

Terms

a(0) =3a(1) =2a(2) =13a(3) =12a(4) =15a(5) =14a(6) =9a(7) =8a(8) =11a(9) =10a(10) =53a(11) =52a(12) =55a(13) =54a(14) =49a(15) =48a(16) =51a(17) =50a(18) =61a(19) =60a(20) =63a(21) =62a(22) =57a(23) =56a(24) =59a(25) =58a(26) =37a(27) =36a(28) =39a(29) =38