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

Terms

a(0) =1a(1) =3a(2) =5a(3) =10a(4) =19a(5) =37a(6) =72a(7) =141a(8) =277a(9) =546a(10) =1079a(11) =2137a(12) =4240a(13) =8425a(14) =16761a(15) =33378a(16) =66523a(17) =132669a(18) =264728a(19) =528469a(20) =1055341a(21) =2108098a(22) =4212015a(23) =8417265a(24) =16823584a(25) =33629457a(26) =67230257a(27) =134414146a(28) =268753267a(29) =537385141