A012790 - OEIS

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A012790

tanh(sec(x)*arcsin(x))=x+2/3!*x^3-20/5!*x^5-1104/7!*x^7-23728/9!*x^9...

1, 2, -20, -1104, -23728, 2048224, 394518592, 28921612032, -3968669081344, -2038929577444864, -347998546570798080, 59058720637105172480, 67936182152875665510400, 22515279368057454566531072 (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: A158843 A008793 A015192 * A273194 A013144 A239642` `Adjacent sequences: A012787 A012788 A012789 * A012791 A012792 A012793`
	KEYWORD	`sign`
	AUTHOR	`Patrick Demichel (patrick.demichel(AT)hp.com)`
	STATUS	`approved`

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Last modified May 22 10:55 EDT 2022. Contains 353949 sequences. (Running on oeis4.)