Number of Carmichael numbers between 2^n and 2^(n+1).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =1a(9) =2a(10) =2a(11) =1a(12) =3a(13) =1a(14) =5a(15) =4a(16) =4a(17) =10a(18) =12a(19) =10a(20) =14a(21) =26a(22) =35a(23) =32a(24) =52a(25) =76a(26) =85a(27) =108a(28) =173a(29) =208