Inverse Weigh transform of 5^n.

Terms

a(0) =5a(1) =15a(2) =40a(3) =165a(4) =624a(5) =2620a(6) =11160a(7) =48915a(8) =217000a(9) =976872a(10) =4438920a(11) =20346320a(12) =93900240a(13) =435970980a(14) =2034504992a(15) =9536767665a(16) =44878791360a(17) =211927733500