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

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =24a(5) =60a(6) =148a(7) =368a(8) =912a(9) =2264a(10) =5616a(11) =13936a(12) =34576a(13) =85792a(14) =212864a(15) =528160a(16) =1310464a(17) =3251520a(18) =8067648a(19) =20017408a(20) =49667072a(21) =123233664a(22) =305766656a(23) =758666496a(24) =1882398976a(25) =4670597632a(26) =11588660224a(27) =28753717760a(28) =71343560704