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

Terms

a(0) =1a(1) =1a(2) =3a(3) =6a(4) =13a(5) =29a(6) =62a(7) =137a(8) =297a(9) =650a(10) =1417a(11) =3093a(12) =6750a(13) =14729a(14) =32145a(15) =70146a(16) =153081a(17) =334061a(18) =729014a(19) =1590905a(20) =3471785a(21) =7576378a(22) =16533705a(23) =36081029a(24) =78738574a(25) =171828905a(26) =374977217a(27) =818301874a(28) =1785756377a(29) =3897004189