Numbers whose maximal base-2 run length is 2.

Terms

a(0) =3a(1) =4a(2) =6a(3) =9a(4) =11a(5) =12a(6) =13a(7) =18a(8) =19a(9) =20a(10) =22a(11) =25a(12) =26a(13) =27a(14) =36a(15) =37a(16) =38a(17) =41a(18) =43a(19) =44a(20) =45a(21) =50a(22) =51a(23) =52a(24) =53a(25) =54a(26) =73a(27) =74a(28) =75a(29) =76