Powers of fourth root of 19 rounded down.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =19a(5) =39a(6) =82a(7) =172a(8) =361a(9) =753a(10) =1573a(11) =3285a(12) =6859a(13) =14320a(14) =29897a(15) =62420a(16) =130321a(17) =272083a(18) =568056a(19) =1185986a(20) =2476099a(21) =5169593a(22) =10793065a(23) =22533736a(24) =47045881a(25) =98222278a(26) =205068240a(27) =428140987a(28) =893871739