Fibonacci sequence beginning 0, 27.

Terms

a(0) =0a(1) =27a(2) =27a(3) =54a(4) =81a(5) =135a(6) =216a(7) =351a(8) =567a(9) =918a(10) =1485a(11) =2403a(12) =3888a(13) =6291a(14) =10179a(15) =16470a(16) =26649a(17) =43119a(18) =69768a(19) =112887a(20) =182655a(21) =295542a(22) =478197a(23) =773739a(24) =1251936a(25) =2025675a(26) =3277611a(27) =5303286a(28) =8580897a(29) =13884183