a(n) = 5651522*n^2 - 2541672*n + 285769.

Terms

a(0) =3395619a(1) =17808513a(2) =43524451a(3) =80543433a(4) =128865459a(5) =188490529a(6) =259418643a(7) =341649801a(8) =435184003a(9) =540021249a(10) =656161539a(11) =783604873a(12) =922351251a(13) =1072400673a(14) =1233753139a(15) =1406408649a(16) =1590367203a(17) =1785628801a(18) =1992193443a(19) =2210061129