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Search: id:A012110
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A012110 sech(arcsin(sinh(x)))=1-1/2!*x^2-3/4!*x^4-21/6!*x^6-1543/8!*x^8... +0
1
1, -1, -3, -21, -1543, -139241, -17567883, -3247844861, -820544875023, -270409929116881, -112752402237298963, -58042577464009155301, -36153625550535244615703, -26800108152000698851560121 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A111438 A058635 A077260 this_sequence A054739 A117508 A001139

Adjacent sequences: A012107 A012108 A012109 this_sequence A012111 A012112 A012113

KEYWORD

sign

AUTHOR

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

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Last modified July 4 18:25 EDT 2008. Contains 140886 sequences.

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