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

Terms

a(0) =1a(1) =3a(2) =8a(3) =22a(4) =61a(5) =165a(6) =430a(7) =1080a(8) =2627a(9) =6223a(10) =14428a(11) =32874a(12) =73849a(13) =163977a(14) =360602a(15) =786604a(16) =1704127a(17) =3670227a(18) =7864552a(19) =16777470a(20) =35651861a(21) =75497773a(22) =159383878a(23) =335544672a(24) =704643451a(25) =1476395415a(26) =3087008180a(27) =6442451410a(28) =13421773297a(29) =27917287953