Expansion of (1+x)/(1-5*x).

Terms

a(0) =1a(1) =6a(2) =30a(3) =150a(4) =750a(5) =3750a(6) =18750a(7) =93750a(8) =468750a(9) =2343750a(10) =11718750a(11) =58593750a(12) =292968750a(13) =1464843750a(14) =7324218750a(15) =36621093750a(16) =183105468750a(17) =915527343750