Number of A095747-primes in range ]2^(2n-1),2^2n].

Terms

a(0) =1a(1) =2a(2) =2a(3) =4a(4) =7a(5) =9a(6) =20a(7) =27a(8) =41a(9) =93a(10) =167a(11) =274a(12) =558a(13) =935a(14) =1512a(15) =3275a(16) =6309