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

Terms

a(0) =-1a(1) =1a(2) =2a(3) =5a(4) =4a(5) =1a(6) =-8a(7) =-15a(8) =-16a(9) =1a(10) =32a(11) =65a(12) =64a(13) =1a(14) =-128a(15) =-255a(16) =-256a(17) =1a(18) =512a(19) =1025a(20) =1024a(21) =1a(22) =-2048a(23) =-4095a(24) =-4096a(25) =1a(26) =8192a(27) =16385a(28) =16384a(29) =1