Expansion of Sum_{k>=0} x^(5^k) / (1 - 5*x^(5^k)).

Terms

a(0) =1a(1) =5a(2) =25a(3) =125a(4) =626a(5) =3125a(6) =15625a(7) =78125a(8) =390625a(9) =1953130a(10) =9765625a(11) =48828125a(12) =244140625a(13) =1220703125a(14) =6103515650a(15) =30517578125a(16) =152587890625a(17) =762939453125