Number of 8k+1 primes (A007519) in range ]2^n,2^(n+1)].

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =4a(6) =4a(7) =10a(8) =18a(9) =31a(10) =64a(11) =115a(12) =216a(13) =398a(14) =752a(15) =1413a(16) =2692a(17) =5092a(18) =9642a(19) =18355a(20) =35089a(21) =66907a(22) =128431a(23) =246479a(24) =473201a(25) =911650a(26) =1756523a(27) =3390156a(28) =6551387a(29) =12673576