a(n) = (6*n + 4)^5.

Terms

a(0) =1024a(1) =100000a(2) =1048576a(3) =5153632a(4) =17210368a(5) =45435424a(6) =102400000a(7) =205962976a(8) =380204032a(9) =656356768a(10) =1073741824a(11) =1680700000a(12) =2535525376a(13) =3707398432a(14) =5277319168a(15) =7339040224a(16) =10000000000a(17) =13382255776a(18) =17623416832a(19) =22877577568a(20) =29316250624a(21) =37129300000a(22) =46525874176