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Search: id:A012565
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A012565 sech(sinh(x)*arctan(x))=1-12/4!*x^4+120/6!*x^6+1680/8!*x^8... +0
1
1, 0, -12, 120, 1680, -4800, -20091456, 2552065152, -264925689600, 68708953577472, -29508519541947392, 12189637912025356288, -5505843502429896863744, 3137663619884947867484160 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A012562 A012563 A012564 this_sequence A012566 A012567 A012568

Sequence in context: A067102 A129064 A120585 this_sequence A012621 A102341 A009078

KEYWORD

sign

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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