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%I #8 Nov 02 2019 13:26:07
%S 1,1,3,45,35,4725,31185,945945,289575,310134825,3273645375,
%T 50414138775,5749711695,102776096548125,1494206326738125,
%U 92854250304440625,191898783962510625,107655217802968460625
%N Reduced denominators of x^(2n) in the series expansion of erf(x)^2 Pi/4 about 0.
%H Eric Weisstein's World of Mathematics, <a href="http://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. A103979.
%K nonn,frac
%O 0,3
%A _Eric W. Weisstein_, Feb 23 2005
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