Ceiling((n+1/n)^6).

Terms

a(0) =64a(1) =245a(2) =1372a(3) =5893a(4) =19771a(5) =54993a(6) =132811a(7) =287701a(8) =572043a(9) =1061521a(10) =1861243a(11) =3112581a(12) =5000731a(13) =7762993a(14) =11697771a(15) =17174293a(16) =24643051a(17) =34646961a(18) =47833243a(19) =64966021a(20) =86939643a(21) =114792721a(22) =149722891a(23) =193102293a(24) =246493771a(25) =311667793a(26) =390620091a(27) =485590021