a(n) = (12n+4)^5.

Terms

a(0) =1024a(1) =1048576a(2) =17210368a(3) =102400000a(4) =380204032a(5) =1073741824a(6) =2535525376a(7) =5277319168a(8) =10000000000a(9) =17623416832a(10) =29316250624a(11) =46525874176a(12) =71008211968a(13) =104857600000a(14) =150536645632a(15) =210906087424a(16) =289254654976a(17) =389328928768a(18) =515363200000a(19) =672109330432a(20) =864866612224