%I #9 Feb 16 2025 08:32:56
%S 0,1,-2,14,-4,166,-292,2092,-136,28102,-52412,131468,-2264,5692636,
%T -10892936,83688344,-20155888,1246068806,-541124,2675231852,-19548472,
%U 40491935468,-552572485496,4314388905704,-13091776816,65972020761116
%N Reduced numerators of x^(2n) in the series expansion of erf(x)^2 Pi/4 about 0.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Erf.html">Erf</a>
%e x^2 - (2*x^4)/3 + (14*x^6)/45 - (4*x^8)/35 + (166*x^10)/4725 + ...
%Y Cf. A103980.
%K sign,frac,changed
%O 0,3
%A _Eric W. Weisstein_, Feb 23 2005