Expansion of 2*x*(1 - 2*x)/(1 + 2*x - 8*x^2 - sqrt(1 - 4*x^2)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =23a(5) =64a(6) =182a(7) =512a(8) =1451a(9) =4096a(10) =11594a(11) =32768a(12) =92710a(13) =262144a(14) =741548a(15) =2097152a(16) =5931955a(17) =16777216a(18) =47454210a(19) =134217728a(20) =379628818a(21) =1073741824a(22) =3037013748a(23) =8589934592a(24) =24296051198a(25) =68719476736a(26) =194368201572a(27) =549755813888