a(n) = Fibonacci(n)*2^n + 1.

Terms

a(0) =1a(1) =3a(2) =5a(3) =17a(4) =49a(5) =161a(6) =513a(7) =1665a(8) =5377a(9) =17409a(10) =56321a(11) =182273a(12) =589825a(13) =1908737a(14) =6176769a(15) =19988481a(16) =64684033a(17) =209321985a(18) =677380097a(19) =2192048129a(20) =7093616641a(21) =22955425793a(22) =74285318145a(23) =240392339457a(24) =777925951489