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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =13a(6) =31a(7) =61a(8) =115a(9) =232a(10) =505a(11) =1117a(12) =2413a(13) =5089a(14) =10660a(15) =22477a(16) =47779a(17) =101833a(18) =216619a(19) =459568a(20) =974017a(21) =2065465a(22) =4383769a(23) =9307633a(24) =19759108a(25) =41934589a(26) =88985383a(27) =188834389a(28) =400758931a(29) =850562776