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

Terms

a(0) =1a(1) =-3a(2) =5a(3) =-9a(4) =19a(5) =-39a(6) =77a(7) =-153a(8) =307a(9) =-615a(10) =1229a(11) =-2457a(12) =4915a(13) =-9831a(14) =19661a(15) =-39321a(16) =78643a(17) =-157287a(18) =314573a(19) =-629145a(20) =1258291a(21) =-2516583a(22) =5033165a(23) =-10066329a(24) =20132659a(25) =-40265319a(26) =80530637a(27) =-161061273a(28) =322122547a(29) =-644245095