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

Terms

a(0) =0a(1) =1a(2) =7a(3) =22a(4) =100a(5) =376a(6) =1552a(7) =6112a(8) =24640a(9) =98176a(10) =393472a(11) =1572352a(12) =6292480a(13) =25163776a(14) =100667392a(15) =402644992a(16) =1610629120a(17) =6442418176a(18) =25769869312a(19) =103079084032a(20) =412317122560