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

Terms

a(0) =1a(1) =2a(2) =2a(3) =5a(4) =11a(5) =18a(6) =34a(7) =68a(8) =126a(9) =235a(10) =450a(11) =851a(12) =1601a(13) =3032a(14) =5739a(15) =10838a(16) =20489a(17) =38752a(18) =73252a(19) =138472a(20) =261813a(21) =494973a(22) =935737a(23) =1769080a(24) =3344567a(25) =6323023a(26) =11953991a(27) =22599701a(28) =42725841a(29) =80775310