a(n) = (12*n + 8)^5.

Terms

a(0) =32768a(1) =3200000a(2) =33554432a(3) =164916224a(4) =550731776a(5) =1453933568a(6) =3276800000a(7) =6590815232a(8) =12166529024a(9) =21003416576a(10) =34359738368a(11) =53782400000a(12) =81136812032a(13) =118636749824a(14) =168874213376a(15) =234849287168a(16) =320000000000a(17) =428232184832a(18) =563949338624a(19) =732082482176a(20) =938120019968