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

Terms

a(0) =1a(1) =2a(2) =7a(3) =15a(4) =32a(5) =62a(6) =117a(7) =214a(8) =385a(9) =683a(10) =1200a(11) =2092a(12) =3625a(13) =6250a(14) =10731a(15) =18359a(16) =31312a(17) =53258a(18) =90365a(19) =152990a(20) =258501a(21) =435987a(22) =734112a(23) =1234200a(24) =2072017a(25) =3474002a(26) =5817487a(27) =9730719a(28) =16258880a(29) =27139478