Expansion of o.g.f.(1-x^4)/(1-x+x^8).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =0a(5) =0a(6) =0a(7) =0a(8) =-1a(9) =-2a(10) =-3a(11) =-4a(12) =-4a(13) =-4a(14) =-4a(15) =-4a(16) =-3a(17) =-1a(18) =2a(19) =6a(20) =10a(21) =14a(22) =18a(23) =22a(24) =25a(25) =26a(26) =24a(27) =18a(28) =8a(29) =-6