Number of 8k+7 primes (A007522) in range ]2^n,2^(n+1)].

Terms

a(0) =0a(1) =1a(2) =0a(3) =2a(4) =1a(5) =4a(6) =6a(7) =12a(8) =17a(9) =36a(10) =62a(11) =118a(12) =222a(13) =395a(14) =773a(15) =1412a(16) =2699a(17) =5100a(18) =9690a(19) =18384a(20) =35074a(21) =67076a(22) =128446a(23) =246483a(24) =473737a(25) =911126a(26) =1757021a(27) =3390639a(28) =6551367a(29) =12675525