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

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =9a(5) =22a(6) =45a(7) =101a(8) =218a(9) =477a(10) =1041a(11) =2270a(12) =4957a(13) =10813a(14) =23602a(15) =51501a(16) =112393a(17) =245270a(18) =535245a(19) =1168053a(20) =2549002a(21) =5562621a(22) =12139137a(23) =26490894a(24) =57810301a(25) =126157741a(26) =275310370a(27) =600801805a(28) =1311112313a(29) =2861202246