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%I #8 Mar 20 2017 03:40:37
%S 12,90,90720,302400,239500800,245188944000,104613949440,
%T 333456963840000,4180167995867136000,603108220176000000,
%U 31022420086661971968000,4962375400581280281600000
%N Denominator of coefficient of z^(2n) in log(InverseErf(z)).
%H G. C. Greubel, <a href="/A114860/b114860.txt">Table of n, a(n) for n = 1..224</a>
%e (Pi*z^2)/12 + (Pi^2*z^4)/90 + (193*Pi^3*z^6)/90720 + log(sqrt(Pi)/2) + log(z) + ...
%t Denominator[CoefficientList[Series[Log[InverseErf[x]] , {x,0,50}], x]][[;; ;; 2]] (* _G. C. Greubel_, Mar 19 2017 *)
%Y Cf. A114859.
%K nonn,frac
%O 1,1
%A _Eric W. Weisstein_, Jan 02 2006