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

Terms

a(0) =64a(1) =244a(2) =1372a(3) =5893a(4) =19771a(5) =54992a(6) =132810a(7) =287700a(8) =572042a(9) =1061520a(10) =1861242a(11) =3112580a(12) =5000730a(13) =7762992a(14) =11697770a(15) =17174292a(16) =24643050a(17) =34646960a(18) =47833242a(19) =64966020a(20) =86939642a(21) =114792720a(22) =149722890a(23) =193102292a(24) =246493770