Powers of fourth root of 19 rounded up.

Terms

a(0) =1a(1) =3a(2) =5a(3) =10a(4) =19a(5) =40a(6) =83a(7) =173a(8) =361a(9) =754a(10) =1574a(11) =3286a(12) =6859a(13) =14321a(14) =29898a(15) =62421a(16) =130321a(17) =272084a(18) =568057a(19) =1185987a(20) =2476099a(21) =5169594a(22) =10793066a(23) =22533737a(24) =47045881a(25) =98222279a(26) =205068241a(27) =428140988a(28) =893871739