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

Terms

a(0) =1a(1) =-6a(2) =29a(3) =-138a(4) =660a(5) =-3162a(6) =15151a(7) =-72594a(8) =347819a(9) =-1666500a(10) =7984680a(11) =-38256900a(12) =183299821a(13) =-878242206a(14) =4207911209a(15) =-20161313838a(16) =96598657980a(17) =-462831976062