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

Terms

a(0) =1a(1) =0a(2) =-1a(3) =-2a(4) =-1a(5) =2a(6) =5a(7) =4a(8) =-3a(9) =-12a(10) =-13a(11) =2a(12) =27a(13) =38a(14) =9a(15) =-56a(16) =-103a(17) =-56a(18) =103a(19) =262a(20) =215a(21) =-150a(22) =-627a(23) =-692a(24) =85a(25) =1404a(26) =2011a(27) =522a(28) =-2893a(29) =-5426