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

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =19a(5) =28a(6) =40a(7) =60a(8) =85a(9) =110a(10) =140a(11) =182a(12) =231a(13) =280a(14) =336a(15) =408a(16) =489a(17) =570a(18) =660a(19) =770a(20) =891a(21) =1012a(22) =1144a(23) =1300a(24) =1469a(25) =1638a(26) =1820a(27) =2030a(28) =2255a(29) =2480