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

Terms

a(0) =1a(1) =1a(2) =-2a(3) =-8a(4) =-8a(5) =16a(6) =64a(7) =64a(8) =-128a(9) =-512a(10) =-512a(11) =1024a(12) =4096a(13) =4096a(14) =-8192a(15) =-32768a(16) =-32768a(17) =65536a(18) =262144a(19) =262144a(20) =-524288a(21) =-2097152a(22) =-2097152a(23) =4194304a(24) =16777216a(25) =16777216a(26) =-33554432a(27) =-134217728a(28) =-134217728a(29) =268435456