Recip transform of 2*(1 + x^2 + x^4)-1/(1-x).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =19a(8) =93a(9) =353a(10) =1125a(11) =3173a(12) =8221a(13) =20297a(14) =50055a(15) =130255a(16) =370545a(17) =1140001a(18) =3636265a(19) =11563041a(20) =35888977a(21) =108146737a(22) =317966187a(23) =922132531a(24) =2672794621a(25) =7832167585a(26) =23346616525a(27) =70754228885a(28) =216792576093