Expansion of 1/sqrt(1-4x+4x^2-16x^3).

Terms

a(0) =1a(1) =2a(2) =4a(3) =16a(4) =64a(5) =224a(6) =800a(7) =3008a(8) =11392a(9) =43008a(10) =163328a(11) =624640a(12) =2397696a(13) =9227264a(14) =35608576a(15) =137764864a(16) =534102016a(17) =2074394624a(18) =8069922816a(19) =31440338944a(20) =122652655616a(21) =479052693504