%I
%S 1,1,7,97,2063,17803,250781,166831871,43685848289,447550424579,
%T 84677077231169,11657476758734011,28924058075775365981,
%U 44287070229737735633567,305190813989360271816409
%N Numerator of [x^(2n)] in the Taylor expansion cos(cosec(x)cot(x))= 1x^2/8 7*x^4/384 97*x^6/46080 2063*x^8/10321920 17803*x^10/1238630400 ....
%C The e.g.f of x/2, cos(cosec(x)cot(x)) = 1 1*x^2/(2^2*2!) 7*x^4/(2^4*4!) 97*x^6/(2^6*6!) 2063*x^8/(2^8*8!) ..., is apparently covered by A003710.
%H G. C. Greubel, <a href="/A013521/b013521.txt">Table of n, a(n) for n = 0..125</a>
%t Numerator[Take[CoefficientList[Series[Cos[Csc[x]  Cot[x]], {x, 0, 25}], x], {1, 1, 2}]] (* _G. C. Greubel_, Nov 12 2016 *)
%K sign,frac
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E Name edited by _R. J. Mathar_, Dec 19 2011
