Expansion of (1-4x)/((1+4x)(1-8x)).

Terms

a(0) =1a(1) =0a(2) =32a(3) =128a(4) =1536a(5) =10240a(6) =90112a(7) =688128a(8) =5636096a(9) =44564480a(10) =358612992a(11) =2860515328a(12) =22917677056a(13) =183207198720