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%I #4 Dec 12 2016 09:16:22
%S 1,1,3,11,19,361,307,24611,83579,2873041,12193841,512343611,869783713,
%T 11779156811,769881545161,44110959165011,299540369626699,
%U 19450718635716001,16510282817165209,10784052561125704811,8321625562774808569,7342627959965776406281
%N Numerators of coefficients in expansion of 1/(cos x - sin x).
%H Clark Kimberling, <a href="/A279257/b279257.txt">Table of n, a(n) for n = 0..1000</a>
%e 1/1 + (1/1)x + (3/2)x^2 + (11/6)x^3 + (19/8)x^3 + ... ; 1/1, 1/1, 3/2, 11/6, ... = A279257/A279258.
%t z = 30; t = CoefficientList[Series[1/(Cos[x] - Sin[x]), {x, 0, z}], x];
%t Numerator[t] (* A279257 *)
%t Denominator[t] (* A279258 *)
%Y Cf. A279258.
%K nonn,easy,frac
%O 0,3
%A _Clark Kimberling_, Dec 11 2016
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