Expansion of (1-x^2)/(1-2x+2x^3+x^4).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =3a(5) =-2a(6) =-15a(7) =-40a(8) =-79a(9) =-126a(10) =-157a(11) =-116a(12) =99a(13) =638a(14) =1665a(15) =3248a(16) =5121a(17) =6274a(18) =4387a(19) =-4716a(20) =-27101a(21) =-69250a(22) =-133455a(23) =-207992a(24) =-250383a(25) =-164606a(26) =220227a(27) =1149212a(28) =2878019a(29) =5480190