Numbers with no adjacent 0's in binary expansion.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =5a(5) =6a(6) =7a(7) =10a(8) =11a(9) =13a(10) =14a(11) =15a(12) =21a(13) =22a(14) =23a(15) =26a(16) =27a(17) =29a(18) =30a(19) =31a(20) =42a(21) =43a(22) =45a(23) =46a(24) =47a(25) =53a(26) =54a(27) =55a(28) =58a(29) =59