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

Terms

a(0) =1a(1) =3a(2) =12a(3) =37a(4) =111a(5) =315a(6) =864a(7) =2307a(8) =6027a(9) =15471a(10) =39132a(11) =97755a(12) =241606a(13) =591636a(14) =1437078a(15) =3465748a(16) =8305161a(17) =19788957a(18) =46910232a(19) =110686101a(20) =260064912a(21) =608684490a(22) =1419591546a(23) =3300027546a(24) =7648265728a(25) =17676484410a(26) =40747630332a(27) =93704299336a(28) =214999206831a(29) =492262973433