a(n) = floor((n + 1/n)^7).

Terms

a(0) =128a(1) =610a(2) =4572a(3) =25045a(4) =102807a(5) =339119a(6) =948645a(7) =2337564a(8) =5211939a(9) =10721353a(10) =20642867a(11) =37610342a(12) =65394162a(13) =109236388a(14) =176246402a(15) =275862066a(16) =420381442a(17) =625570111a(18) =911349137a(19) =1302568701a(20) =1829872465a(21) =2530657691a(22) =3450136161a(23) =4642500937a(24) =6172204001a(25) =8115349815