Number of 8k+-3 primes (A003629) in range [2^n,2^(n+1)].

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =5a(5) =5a(6) =13a(7) =21a(8) =40a(9) =70a(10) =129a(11) =231a(12) =434a(13) =819a(14) =1505a(15) =2884a(16) =5358a(17) =10198a(18) =19303a(19) =36847a(20) =70173a(21) =134233a(22) =256831a(23) =492856a(24) =947182a(25) =1822968a(26) =3513746a(27) =6781112a(28) =13104524a(29) =25348436