Powers of sqrt(5) rounded up.

Terms

a(0) =1a(1) =3a(2) =5a(3) =12a(4) =25a(5) =56a(6) =125a(7) =280a(8) =625a(9) =1398a(10) =3125a(11) =6988a(12) =15625a(13) =34939a(14) =78125a(15) =174693a(16) =390625a(17) =873465a(18) =1953125a(19) =4367321a(20) =9765625a(21) =21836602a(22) =48828125a(23) =109183007a(24) =244140625a(25) =545915034a(26) =1220703125a(27) =2729575168