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

Terms

a(0) =1a(1) =0a(2) =-2a(3) =0a(4) =4a(5) =0a(6) =-8a(7) =0a(8) =16a(9) =0a(10) =-32a(11) =0a(12) =64a(13) =0a(14) =-128a(15) =0a(16) =256a(17) =0a(18) =-512a(19) =0a(20) =1024a(21) =0a(22) =-2048a(23) =0a(24) =4096a(25) =0a(26) =-8192a(27) =0a(28) =16384a(29) =0