a(n) = (11*n + 5)^5.

Terms

a(0) =3125a(1) =1048576a(2) =14348907a(3) =79235168a(4) =282475249a(5) =777600000a(6) =1804229351a(7) =3707398432a(8) =6956883693a(9) =12166529024a(10) =20113571875a(11) =31757969376a(12) =48261724457a(13) =71008211968a(14) =101621504799a(15) =141985700000a(16) =194264244901