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

Terms

a(0) =0a(1) =2a(2) =4a(3) =16a(4) =48a(5) =160a(6) =512a(7) =1664a(8) =5376a(9) =17408a(10) =56320a(11) =182272a(12) =589824a(13) =1908736a(14) =6176768a(15) =19988480a(16) =64684032a(17) =209321984a(18) =677380096a(19) =2192048128a(20) =7093616640a(21) =22955425792a(22) =74285318144a(23) =240392339456a(24) =777925951488