Expansion of x*(1-6*x+10*x^2)/(1-4*x+2*x^2)^2.

Terms

a(0) =0a(1) =1a(2) =2a(3) =6a(4) =24a(5) =100a(6) =408a(7) =1624a(8) =6336a(9) =24336a(10) =92320a(11) =346720a(12) =1291392a(13) =4776512a(14) =17562496a(15) =64245120a(16) =233969664a(17) =848748800a(18) =3068269056a(19) =11057710592a(20) =39740405760a(21) =142466343936a(22) =509572929536