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

Terms

a(0) =1a(1) =1a(2) =3a(3) =6a(4) =11a(5) =21a(6) =39a(7) =72a(8) =133a(9) =245a(10) =451a(11) =830a(12) =1527a(13) =2809a(14) =5167a(15) =9504a(16) =17481a(17) =32153a(18) =59139a(19) =108774a(20) =200067a(21) =367981a(22) =676823a(23) =1244872a(24) =2289677a(25) =4211373a(26) =7745923a(27) =14246974a(28) =26204271a(29) =48197169