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

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =15a(5) =35a(6) =84a(7) =204a(8) =493a(9) =1189a(10) =2870a(11) =6930a(12) =16731a(13) =40391a(14) =97512a(15) =235416a(16) =568345a(17) =1372105a(18) =3312554a(19) =7997214a(20) =19306983a(21) =46611179a(22) =112529340a(23) =271669860a(24) =655869061a(25) =1583407981a(26) =3822685022a(27) =9228778026a(28) =22280241075a(29) =53789260175