Expansion of (1+6*x)/(1-4*x)^(7/2).

Terms

a(0) =1a(1) =20a(2) =210a(3) =1680a(4) =11550a(5) =72072a(6) =420420a(7) =2333760a(8) =12471030a(9) =64664600a(10) =327202876a(11) =1622493600a(12) =7909656300a(13) =38003792400a(14) =180324117000a(15) =846321189120