Expansion of a parametrization of x^2 - y + y^2 = 0 at x = y = 0.

Terms

a(0) =1a(1) =-2a(2) =-6a(3) =20a(4) =-26a(5) =324a(6) =932a(7) =-3864a(8) =-12282a(9) =-8812a(10) =123596a(11) =-1011048a(12) =1302748a(13) =-9066968a(14) =-11700216a(15) =327436496a(16) =500340678a(17) =4725531060a(18) =3741191612a(19) =-11250963784a(20) =-147523219212a(23) =-675852523344