Semi-sums (means) of a Fermat prime and a Mersenne prime.

Terms

a(0) =3a(1) =4a(2) =5a(3) =6a(4) =10a(5) =12a(6) =17a(7) =18a(8) =24a(9) =65a(10) =66a(11) =72a(12) =130a(13) =132a(14) =144a(15) =192a(16) =4097a(17) =4098a(18) =4104a(19) =4224a(20) =32770a(21) =32772a(22) =32784a(23) =32832a(24) =36864a(25) =65537a(26) =65538a(27) =65544a(28) =65664a(29) =98304