a(n) = (9*n + 8)^5.

Terms

a(0) =32768a(1) =1419857a(2) =11881376a(3) =52521875a(4) =164916224a(5) =418195493a(6) =916132832a(7) =1804229351a(8) =3276800000a(9) =5584059449a(10) =9039207968a(11) =14025517307a(12) =21003416576a(13) =30517578125a(14) =43204003424a(15) =59797108943a(16) =81136812032a(17) =108175616801a(18) =141985700000a(19) =183765996899a(20) =234849287168a(21) =296709280757a(22) =370967703776