Number of A080115-primes in range [2^n,2^(n+1)].

Terms

a(0) =0a(1) =0a(2) =0a(3) =3a(4) =4a(5) =9a(6) =16a(7) =33a(8) =59a(9) =107a(10) =204a(11) =376a(12) =719a(13) =1335a(14) =2521a(15) =4804a(16) =9089a(17) =17311a(18) =33100a(19) =63352a(20) =121283