Number of 6k+5 primes (A007528) in range [2^n,2^(n+1)].

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =4a(5) =6a(6) =12a(7) =23a(8) =38a(9) =68a(10) =129a(11) =236a(12) =438a(13) =806a(14) =1516a(15) =2864a(16) =5388a(17) =10178a(18) =19327a(19) =36839a(20) =70201a(21) =134151a(22) =256884a(23) =492947a(24) =947240a(25) =1822831a(26) =3513553a(27) =6781479a(28) =13103713a(29) =25349311