Number of Fermat pseudoprimes to base 2 between 2^n and 2^(n+1) that are not Carmichael numbers.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =1a(9) =3a(10) =3a(11) =5a(12) =10a(13) =12a(14) =14a(15) =21a(16) =31a(17) =41a(18) =64a(19) =100a(20) =127a(21) =165a(22) =216a(23) =288a(24) =397a(25) =572a(26) =723a(27) =955a(28) =1344a(29) =1793