Number of prime lucky numbers k between powers of 2, 2^n < k < 2^(n+1).

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =4a(7) =6a(8) =10a(9) =19a(10) =25a(11) =46a(12) =70a(13) =126a(14) =226a(15) =360a(16) =708a(17) =1237a(18) =2215a(19) =3902a(20) =7281a(21) =13243a(22) =24140a(23) =44006a(24) =81479a(25) =150526a(26) =278981a(27) =519383a(28) =966444a(29) =1803380