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

Terms

a(0) =1a(1) =-1a(2) =2a(3) =-5a(4) =9a(5) =-18a(6) =37a(7) =-73a(8) =146a(9) =-293a(10) =585a(11) =-1170a(12) =2341a(13) =-4681a(14) =9362a(15) =-18725a(16) =37449a(17) =-74898a(18) =149797a(19) =-299593a(20) =599186a(21) =-1198373a(22) =2396745a(23) =-4793490a(24) =9586981a(25) =-19173961a(26) =38347922a(27) =-76695845a(28) =153391689a(29) =-306783378