Number of fibevil primes (A095084) in range ]2^n,2^(n+1)].

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =9a(7) =21a(8) =34a(9) =67a(10) =122a(11) =203a(12) =439a(13) =812a(14) =1562a(15) =2826a(16) =5304a(17) =10357a(18) =19247a(19) =36684a(20) =70168a(21) =134211a(22) =256937a(23) =492730a(24) =946967a(25) =1823368a(26) =3512484a(27) =6781240a(28) =13103839a(29) =25345814