Expansion of (1-4*x)^(9/2).

Terms

a(0) =1a(1) =-18a(2) =126a(3) =-420a(4) =630a(5) =-252a(6) =-84a(7) =-72a(8) =-90a(9) =-140a(10) =-252a(11) =-504a(12) =-1092a(13) =-2520a(14) =-6120a(15) =-15504a(16) =-40698a(17) =-110124a(18) =-305900a(19) =-869400a(20) =-2521260a(21) =-7443720a(22) =-22331160a(23) =-67964400a(24) =-209556900a(25) =-653817528a(26) =-2062039896a(27) =-6567978928a(28) =-21111360840