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

Terms

a(0) =1a(1) =0a(2) =3a(3) =1a(4) =10a(5) =7a(6) =35a(7) =36a(8) =127a(9) =165a(10) =474a(11) =715a(12) =1807a(13) =3004a(14) =6995a(15) =12393a(16) =27370a(17) =50559a(18) =107883a(19) =204820a(20) =427351a(21) =826045a(22) =1698458a(23) =3321891a(24) =6765175a(25) =13333932a(26) =26985675a(27) =53457121a(28) =107746282a(29) =214146295