Numbers whose maximal base-2 run length is 4.

Terms

a(0) =15a(1) =16a(2) =30a(3) =33a(4) =47a(5) =48a(6) =60a(7) =61a(8) =66a(9) =67a(10) =79a(11) =80a(12) =94a(13) =97a(14) =111a(15) =112a(16) =120a(17) =121a(18) =122a(19) =123a(20) =132a(21) =133a(22) =134a(23) =135a(24) =143a(25) =144a(26) =158a(27) =161a(28) =175a(29) =176