Expansion of ((1-x)/(1-2x))^5.

Terms

a(0) =1a(1) =5a(2) =20a(3) =70a(4) =225a(5) =681a(6) =1970a(7) =5500a(8) =14920a(9) =39520a(10) =102592a(11) =261760a(12) =657920a(13) =1632000a(14) =4001280a(15) =9708544a(16) =23336960a(17) =55623680a(18) =131563520a(19) =309002240a(20) =721092608a(21) =1672806400a(22) =3859415040a(23) =8859156480a(24) =20240138240a(25) =46038777856a(26) =104291368960a(27) =235342397440a(28) =529153392640