a(n) = (6*n + 2)^5.

Terms

a(0) =32a(1) =32768a(2) =537824a(3) =3200000a(4) =11881376a(5) =33554432a(6) =79235168a(7) =164916224a(8) =312500000a(9) =550731776a(10) =916132832a(11) =1453933568a(12) =2219006624a(13) =3276800000a(14) =4704270176a(15) =6590815232a(16) =9039207968a(17) =12166529024a(18) =16105100000a(19) =21003416576a(20) =27027081632a(21) =34359738368a(22) =43204003424a(23) =53782400000