a(n) = (10*n + 4)^5.

Terms

a(0) =1024a(1) =537824a(2) =7962624a(3) =45435424a(4) =164916224a(5) =459165024a(6) =1073741824a(7) =2219006624a(8) =4182119424a(9) =7339040224a(10) =12166529024a(11) =19254145824a(12) =29316250624a(13) =43204003424a(14) =61917364224a(15) =86617093024a(16) =118636749824