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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-... 0
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 November 22 06:11 EST 2017. Contains 295076 sequences.