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%I #7 Mar 07 2020 02:03:00
%S 1,1,2,2,8,120,240,720,5760,362880,3628800,57600,691200,6227020800,
%T 830269440,261534873600,20922789888000,355687428096000,
%U 914624815104000,426824913715200,4742499041280000,51090942171709440000,3784514234941440000
%N Denominators of coefficients in Taylor series for exp(tan(x)).
%D CRC Standard Mathematical Tables and Formulae, 30th ed. 1996, p. 42.
%e 1 + 1*x + (1/2)*x^2 + (1/2)*x^3 + (3/8)*x^4 + (37/120)*x^5 + (59/240)*x^6 + (137/720)*x^7 + (871/5760)*x^8 + ...
%Y Cf. A047691, A006229.
%K nonn,easy,frac
%O 0,3
%A _N. J. A. Sloane_
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