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

Terms

a(0) =1a(1) =1a(2) =-1a(3) =-4a(4) =-3a(5) =6a(6) =16a(7) =7a(8) =-31a(9) =-61a(10) =-6a(11) =147a(12) =220a(13) =-68a(14) =-655a(15) =-739a(16) =639a(17) =2772a(18) =2233a(19) =-3950a(20) =-11188a(21) =-5521a(22) =20805a(23) =43035a(24) =6946a(25) =-99929a(26) =-156856a(27) =36056a(28) =449697a(29) =534441