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%I #4 Feb 24 2012 12:50:40
%S 1,1,13,421,26713,2871241,473357413,111506036461,35624155784113,
%T 14838126699784081,7813931867856058813,5076900281143623362101,
%U 3989607021222775392853513,3730016905780866035656178521
%N cosh(arcsin(tan(x)))=1+1/2!*x^2+13/4!*x^4+421/6!*x^6+26713/8!*x^8...
%K nonn
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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