Number of 5k+3 primes (A030431) in range ]2^n,2^(n+1)].

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =4a(6) =5a(7) =11a(8) =18a(9) =36a(10) =63a(11) =117a(12) =220a(13) =407a(14) =760a(15) =1435a(16) =2682a(17) =5074a(18) =9683a(19) =18392a(20) =35113a(21) =67054a(22) =128503a(23) =246433a(24) =473717a(25) =911310a(26) =1756933a(27) =3390711a(28) =6551833a(29) =12673497