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A012678 arcsin(tanh(x)*arctan(x))=2/2!*x^2-16/4!*x^4+440/6!*x^6-25856/8!*x^8... 0
2, -16, 440, -25856, 2702368, -442400000, 104680527744, -33826438987776, 14318658795815424, -7689929339111084032, 5108988246588765059072, -4113772753950316528205824, 3947181962951541949825294336 (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: A009700 A012030 A012682 * A012146 A113109 A223563

Adjacent sequences:  A012675 A012676 A012677 * A012679 A012680 A012681

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified October 26 00:28 EDT 2020. Contains 338026 sequences. (Running on oeis4.)