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

Terms

a(0) =2a(1) =8a(2) =27a(3) =84a(4) =248a(5) =708a(6) =1973a(7) =5400a(8) =14574a(9) =38896a(10) =102863a(11) =269964a(12) =703972a(13) =1825612a(14) =4711785a(15) =12110064a(16) =31010266a(17) =79148184a(18) =201420163a(19) =511233156a(20) =1294489296a(21) =3270662036a(22) =8247316765a(23) =20758752648a(24) =52163239622a(25) =130875524096a(26) =327893289783a(27) =820410399804