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

Terms

a(0) =1a(1) =2a(2) =3a(3) =3a(4) =1a(5) =-4a(6) =-12a(7) =-21a(8) =-26a(9) =-19a(10) =9a(11) =63a(12) =136a(13) =200a(14) =201a(15) =66a(16) =-269a(17) =-805a(18) =-1407a(19) =-1740a(20) =-1268a(21) =611a(22) =4230a(23) =9117a(24) =13393a(25) =13439a(26) =4368a(27) =-18096a(28) =-53999a(29) =-94270