Expansion of ((1-x)/(1-2*x))^7.

Terms

a(0) =1a(1) =7a(2) =35a(3) =147a(4) =553a(5) =1925a(6) =6321a(7) =19825a(8) =59906a(9) =175504a(10) =500864a(11) =1397536a(12) =3823680a(13) =10282496a(14) =27230464a(15) =71129856a(16) =183518720a(17) =468213760a(18) =1182433280a(19) =2958376960a(20) =7338426368a(21) =18059821056a(22) =44120473600a(23) =107055742976a(24) =258122317824a(25) =618683957248