Number of primes whose binary expansion begins '11' (A080166) in range ]2^n,2^(n+1)].

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =7a(6) =11a(7) =21a(8) =37a(9) =67a(10) =125a(11) =227a(12) =431a(13) =787a(14) =1491a(15) =2812a(16) =5296a(17) =10055a(18) =19079a(19) =36343a(20) =69398a(21) =132661a(22) =254122a(23) =488028a(24) =937994a(25) =1806147a(26) =3482463a(27) =6722625a(28) =12994889a(29) =25145151