Round((n+1/n)^7).

Terms

a(0) =128a(1) =610a(2) =4572a(3) =25045a(4) =102807a(5) =339120a(6) =948645a(7) =2337564a(8) =5211940a(9) =10721354a(10) =20642867a(11) =37610343a(12) =65394163a(13) =109236389a(14) =176246402a(15) =275862066a(16) =420381442a(17) =625570112a(18) =911349138a(19) =1302568702a(20) =1829872466a(21) =2530657692