Numerators in expansion of (1-x)^(-7/2).

Terms

a(0) =1a(1) =7a(2) =63a(3) =231a(4) =3003a(5) =9009a(6) =51051a(7) =138567a(8) =2909907a(9) =7436429a(10) =37182145a(11) =91265265a(12) =882230895a(13) =2103781365a(14) =9917826435a(15) =23141595015a(16) =856239015555