Expansion of (1-4*x+3*x^2)/((1-2*x)*(1-4*x+x^2)).

Terms

a(0) =1a(1) =2a(2) =6a(3) =20a(4) =70a(5) =252a(6) =922a(7) =3404a(8) =12630a(9) =46988a(10) =175066a(11) =652764a(12) =2434966a(13) =9085052a(14) =33901146a(15) =126511340a(16) =472127830a(17) =1761967212a(18) =6575675482a(19) =24540603644a(20) =91586476950a(21) =341804779868