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A012449
sinh(arctan(x)*tan(x))=2/2!*x^2+280/6!*x^6-2688/8!*x^8+774688/10!*x^10...
0
2, 0, 280, -2688, 774688, -44971520, 12196692352, -2010939305984, 682495898190336, -217798427799339008, 100459217814408271872, -50559840345962764140544, 31791509418375951964839936
OFFSET
0,1
CROSSREFS
Sequence in context: A348183 A012330 A012336 * A012446 A324687 A012755
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved