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

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =25a(6) =68a(7) =187a(8) =534a(9) =1544a(10) =4554a(11) =13576a(12) =40968a(13) =124681a(14) =382636a(15) =1182116a(16) =3674674a(17) =11483243a(18) =36057516a(19) =113701968a(20) =359927638a(21) =1143327888a(22) =3643379152a(23) =11643793399a(24) =37311200060a(25) =119852247220a(26) =385864664018