Floor((n+1/n)^9).

Terms

a(0) =512a(1) =3814a(2) =50805a(3) =452376a(4) =2779905a(5) =12895977a(6) =48400258a(7) =154315775a(8) =432655358a(9) =1093685272a(10) =2539243267a(11) =5491371250a(12) =11182788769a(13) =21629362253a(14) =40008716648a(15) =71173490663a(16) =122332454247a(17) =203937787267a(18) =330822261550a(19) =523635874526a(20) =810637651662