%I #4 Feb 24 2012 12:51:04
%S 1,0,12,-480,35280,-4208640,737643456,-178203637248,56744323733760,
%T -23028982493429760,11602867906455268352,-7105927543880909185024,
%U 5198792960623369943994368,-4478214849312972324010721280
%N sec(tanh(x)*arctan(x))=1+12/4!*x^4-480/6!*x^6+35280/8!*x^8...
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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