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Search: id:A012184
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A012184 sech(tan(arctanh(x)))=1-1/2!*x^2-11/4!*x^4-301/6!*x^6-14839/8!*x^8... +0
1
1, -1, -11, -301, -14839, -1109881, -110852675, -12696026981, -1044878845295, 344502726652559, 397767671438223365, 311149018395487011299, 242840543036206414510489 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A067424 A001538 A101269 this_sequence A012027 A002114 A012192

Adjacent sequences: A012181 A012182 A012183 this_sequence A012185 A012186 A012187

KEYWORD

sign

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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