Number of 5k+1 primes (A030430) in range [2^n,2^(n+1)].

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =2a(6) =7a(7) =9a(8) =19a(9) =33a(10) =64a(11) =115a(12) =216a(13) =402a(14) =754a(15) =1434a(16) =2669a(17) =5116a(18) =9651a(19) =18382a(20) =35064a(21) =67056a(22) =128394a(23) =246349a(24) =473469a(25) =911468a(26) =1757069a(27) =3389718a(28) =6551877a(29) =12674065