A013307 - OEIS

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A013307

Numerator of [x^n] in the Taylor series arccosh(exp(x)-tan(x))= x-x^2/6 -x^3/72 -43*x^4/432 -221*x^5/10368 -89513*x^6/2177280-...

1, -1, -1, -43, -221, -89513, -149749, -1084711, -209435, -27633784271, -1480512386621, -7957100794591, -26770890495311, -8901132809862257, -397417885842749047, -4636876735719615641 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,4`
	LINKS	`Table of n, a(n) for n=1..16.`
	CROSSREFS	`Sequence in context: A142659 A140041 A264821 * A043375 A038479 A142334` `Adjacent sequences: A013304 A013305 A013306 * A013308 A013309 A013310`
	KEYWORD	`sign,frac`
	AUTHOR	`Patrick Demichel (patrick.demichel(AT)hp.com)`
	EXTENSIONS	`Values replaced by numerators. - R. J. Mathar, Dec 22 2011`
	STATUS	`approved`

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Last modified January 19 06:28 EST 2021. Contains 340266 sequences. (Running on oeis4.)