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

Terms

a(0) =1a(1) =4a(2) =19a(3) =89a(4) =417a(5) =1954a(6) =9156a(7) =42903a(8) =201034a(9) =942001a(10) =4414009a(11) =20683073a(12) =96916320a(13) =454128508a(14) =2127946065a(15) =9971086104a(16) =46722311119a(17) =218930448853