Numbers whose base-2 expansion has no run of digits with length < 2.

Terms

a(0) =3a(1) =7a(2) =12a(3) =15a(4) =24a(5) =28a(6) =31a(7) =48a(8) =51a(9) =56a(10) =60a(11) =63a(12) =96a(13) =99a(14) =103a(15) =112a(16) =115a(17) =120a(18) =124a(19) =127a(20) =192a(21) =195a(22) =199a(23) =204a(24) =207a(25) =224a(26) =227a(27) =231a(28) =240a(29) =243