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

Terms

a(0) =1a(1) =-2a(2) =5a(3) =-13a(4) =33a(5) =-84a(6) =214a(7) =-545a(8) =1388a(9) =-3535a(10) =9003a(11) =-22929a(12) =58396a(13) =-148724a(14) =378773a(15) =-964666a(16) =2456829a(17) =-6257097a(18) =15935689a(19) =-40585304a(20) =103363394a(21) =-263247781a(22) =670444260a(23) =-1707499695a(24) =4348691431a(25) =-11075326817a(26) =28206844760a(27) =-71837707768a(28) =182957587113a(29) =-465959726754