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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =15a(6) =59a(7) =187a(8) =533a(9) =1541a(10) =4893a(11) =16797a(12) =58663a(13) =201347a(14) =679767a(15) =2294967a(16) =7850121a(17) =27247369a(18) =95375225a(19) =334643225a(20) =1174649611a(21) =4129971863a(22) =14570334995a(23) =51610458291a(24) =183436895645a(25) =653582527693