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A012686 sec(tanh(x)*arctan(x))=1+12/4!*x^4-480/6!*x^6+35280/8!*x^8... 0

%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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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)