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A012676 exp(tanh(x)*arctan(x))=1+2/2!*x^2-4/4!*x^4-40/6!*x^6+2704/8!*x^8... 0
1, 2, -4, -40, 2704, -135392, 6955456, -305645184, -7730286336, 7469091807744, -2423718751585280, 765682386623223808, -278356000956737810432, 126892576689335471251456 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

CROSSREFS

Sequence in context: A158213 A012596 A292700 * A184245 A103105 A018312

Adjacent sequences:  A012673 A012674 A012675 * A012677 A012678 A012679

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified September 24 12:20 EDT 2020. Contains 337318 sequences. (Running on oeis4.)