Expansion of (2*x+1)*(1-x) / ( 1-2*x-4*x^2+6*x^3 ).

Terms

a(0) =1a(1) =3a(2) =8a(3) =22a(4) =58a(5) =156a(6) =412a(7) =1100a(8) =2912a(9) =7752a(10) =20552a(11) =54640a(12) =144976a(13) =385200a(14) =1022464a(15) =2715872a(16) =7210400a(17) =19149504a(18) =50845376a(19) =135026368a(20) =358537216a(21) =952107648a(22) =2528205952a(23) =6713619200a(24) =17827416320a(25) =47340073728a(26) =125708097536a(27) =333811992064a(28) =886415931904