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

Terms

a(0) =1a(1) =6a(2) =20a(3) =88a(4) =336a(5) =1376a(6) =5440a(7) =21888a(8) =87296a(9) =349696a(10) =1397760a(11) =5593088a(12) =22368256a(13) =89481216a(14) =357908480a(15) =1431666688a(16) =5726601216a(17) =22906535936a(18) =91625881600a(19) =366504050688