Expansion of (1-x)/((1-x)^2 - 4*x^3).

Terms

a(0) =1a(1) =1a(2) =1a(3) =5a(4) =13a(5) =25a(6) =57a(7) =141a(8) =325a(9) =737a(10) =1713a(11) =3989a(12) =9213a(13) =21289a(14) =49321a(15) =114205a(16) =264245a(17) =611569a(18) =1415713a(19) =3276837a(20) =7584237a(21) =17554489a(22) =40632089a(23) =94046637a(24) =217679141a(25) =503840001a(26) =1166187409a(27) =2699251381a(28) =6247675357a(29) =14460848969