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%I #4 Feb 24 2012 12:51:15
%S 1,4,72,3510,315000,45898650,9783981900,2881566037350,
%T 1118460016674000,553787154746075250,340453667922140272500,
%U 254502044013845436558750,227301229608843762807435000
%N sec(arctan(x)+arcsin(x))=1+4/2!*x^2+72/4!*x^4+3510/6!*x^6+315000/8!*x^8...
%K nonn
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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