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Search: id:A009613
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A009613 sinh(tan(x)*tan(x))=2/2!*x^2+16/4!*x^4+392/6!*x^6+21376/8!*x^8... +0
4
0, 2, 16, 392, 21376, 1875872, 227105536, 35750690432, 7110343684096, 1750588208886272, 523940264885702656, 187423773435078920192, 78905518064423548911616, 38568578386644134655598592 (list; graph; listen)
OFFSET

0,2

MATHEMATICA

Sinh[ Tan[ x ]^2 ] (* Even Part *)

CROSSREFS

Sequence in context: A052737 A002474 A012390 this_sequence A012388 A012752 A130276

Adjacent sequences: A009610 A009611 A009612 this_sequence A009614 A009615 A009616

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net)

EXTENSIONS

Extended and signs tested Mar 15 1997 by Olivier Gerard.

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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