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A012683 arcsinh(tanh(x)*arctan(x))=2/2!*x^2-16/4!*x^4+200/6!*x^6+1024/8!*x^8... 0
2, -16, 200, 1024, -523232, 36263680, 7024697472, -3839533326336, 933770326393344, 5856130402316288, -153024990104004376576, 83925295292036381278208, 4161808298471932199182336 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Sequence in context: A274448 A209586 A334237 * A012677 A158212 A300456

Adjacent sequences:  A012680 A012681 A012682 * A012684 A012685 A012686

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

STATUS

approved

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Last modified May 30 19:06 EDT 2020. Contains 334729 sequences. (Running on oeis4.)