Expansion of 2*x*(1-6*x+12*x^2)/(1-8*x+19*x^2-12*x^3).

Terms

a(0) =0a(1) =2a(2) =4a(3) =18a(4) =92a(5) =442a(6) =2004a(7) =8738a(8) =37132a(9) =155082a(10) =640004a(11) =2619058a(12) =10653372a(13) =43144922a(14) =174174004a(15) =701478978a(16) =2820264812a(17) =11324105962a(18) =45425564004a(19) =182089676498a(20) =729520967452