Add 1, double, add 1, double, etc.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =10a(5) =11a(6) =22a(7) =23a(8) =46a(9) =47a(10) =94a(11) =95a(12) =190a(13) =191a(14) =382a(15) =383a(16) =766a(17) =767a(18) =1534a(19) =1535a(20) =3070a(21) =3071a(22) =6142a(23) =6143a(24) =12286a(25) =12287a(26) =24574a(27) =24575a(28) =49150a(29) =49151