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

Terms

a(0) =1a(1) =6a(2) =27a(3) =104a(4) =363a(5) =1182a(6) =3653a(7) =10836a(8) =31092a(9) =86784a(10) =236640a(11) =632448a(12) =1661056a(13) =4296192a(14) =10961664a(15) =27630592a(16) =68889600a(17) =170065920a(18) =416071680a(19) =1009582080a(20) =2431254528a(21) =5814222848a(22) =13815054336a(23) =32629850112a(24) =76640681984a(25) =179080003584a(26) =416412598272a(27) =963876225024