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Search: id:A012684
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A012684 tanh(tanh(x)*arctan(x))=2/2!*x^2-16/4!*x^4+80/6!*x^6+14464/8!*x^8... +0
1
2, -16, 80, 14464, -1924352, 182456320, -4821633024, -5022496751616, 2274499602284544, -641508042469015552, 58440162971714846720, 91048038738283980652544, -93320295604487977397387264 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Sequence in context: A028336 A045905 A012680 this_sequence A053587 A052346 A071893

Adjacent sequences: A012681 A012682 A012683 this_sequence A012685 A012686 A012687

KEYWORD

sign

AUTHOR

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

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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