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Search: id:A012681
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A012681 cos(tanh(x)*arctan(x))=1-12/4!*x^4+480/6!*x^6-25200/8!*x^8... +0
1
1, 0, -12, 480, -25200, 1789440, -165502656, 18976409088, -2521802100480, 337469315481600, -20084172331338752, -21802197506685280256, 22192552544232587431936, -18125174754251391091998720 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A012687 A012467 A009083 this_sequence A009168 A012460 A012685

Adjacent sequences: A012678 A012679 A012680 this_sequence A012682 A012683 A012684

KEYWORD

sign

AUTHOR

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

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.

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