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Search: id:A012178
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A012178 cos(tan(arctanh(x)))=1-1/2!*x^2-15/4!*x^4-561/6!*x^6-38623/8!*x^8... +0
1
1, -1, -15, -561, -38623, -4206881, -661302639, -140958927825, -38921417469119, -13433349471318337, -5625858245527551439, -2783882722627688439921, -1585166024021465157765535 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A012175 A012176 A012177 this_sequence A012179 A012180 A012181

Sequence in context: A061174 A115918 A110840 this_sequence A012229 A027462 A027534

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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