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%I #16 Feb 02 2019 14:14:04
%S 2,4,22,38,314,1504,16346,24796,331906,2426404,38445118,163944598,
%T 2993870654,2647864592,601353085846,820420721222,18874008233858,
%U 20741357283932,5782164084903302,38314394323494974,1059898973520975218
%N Numerators of the coefficients in power series expansion of exp(2x/(1-x)).
%D K. Knopp, Theory and application of infinite series, Dover, p. 547.
%D O. Perron, Über das infinitäre Verhalten der Koeffizienten einer gewissen Potenzreihe, Archiv d. Math. u. Phys. (3), Vol. 22, pp. 329-340, 1914.
%F a(n) is the numerator of Sum_{i=1..n} binomial(n-1, i-1)*2^i/i!.
%Y Cf. A067655.
%K nonn,frac
%O 1,1
%A _Benoit Cloitre_, Feb 03 2002
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