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A091019 Denominators of the Taylor series of arccosh(z)/sqrt(2(x-1)) about 1. 0
1, 12, 160, 896, 18432, 90112, 851968, 1310720, 142606336, 637534208, 5637144576, 24696061952, 429496729600, 1855425871872, 15942918602752, 68169720922112, 1548112371908608, 3940649673949184, 166633186212708352 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Numerators are A055786.

LINKS

Table of n, a(n) for n=0..18.

Eric Weisstein's World of Mathematics, Inverse Hyperbolic Cosecant

EXAMPLE

Arccosh(z) = 1 + (1 - z)/12 + (3*(-1 + z)^2)/160 - (5*(-1 + z)^3)/896 + (35*(-1 + z)^4)/18432 - (63*(-1 + z)^5)/90112 + ...

CROSSREFS

Cf. A055786.

Sequence in context: A269411 A226297 A112719 * A219418 A098400 A208791

Adjacent sequences:  A091016 A091017 A091018 * A091020 A091021 A091022

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, Dec 13 2003

STATUS

approved

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Last modified December 4 21:33 EST 2016. Contains 278755 sequences.