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

Terms

a(0) =2a(1) =-12a(2) =54a(3) =-224a(4) =890a(5) =-3452a(6) =13198a(7) =-50016a(8) =188498a(9) =-707916a(10) =2652678a(11) =-9925760a(12) =37105802a(13) =-138631292a(14) =517742494a(15) =-1933118784a(16) =7216615970a(17) =-26937891852a(18) =100545928278a(19) =-375272321696