Expansion of (1 -5*x +5*x^2)/((1 -2*x)*(1 -4*x +x^2)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =43a(6) =142a(7) =493a(8) =1766a(9) =6443a(10) =23750a(11) =88045a(12) =327406a(13) =1219531a(14) =4546622a(15) =16958765a(16) =63272054a(17) =236096683a(18) =881049142a(19) =3287968813a(20) =12270563966a(21) =45793762763a(22) =170903438510a(23) =637817894125