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

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =2a(4) =1a(5) =-4a(6) =0a(7) =7a(8) =-3a(9) =-11a(10) =10a(11) =15a(12) =-24a(13) =-16a(14) =49a(15) =7a(16) =-89a(17) =26a(18) =145a(19) =-108a(20) =-208a(21) =279a(22) =245a(23) =-595a(24) =-174a(25) =1119a(26) =-176a(27) =-1888a(28) =1121a(29) =2831