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

Terms

a(0) =0a(1) =2a(2) =7a(3) =29a(4) =117a(5) =474a(6) =1919a(7) =7770a(8) =31460a(9) =127379a(10) =515747a(11) =2088217a(12) =8455018a(13) =34233669a(14) =138609296a(15) =561217582a(16) =2272323599a(17) =9200450421a(18) =37251863241a(19) =150829715006a(20) =610697048403