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A024239 Expansion of tanh(tan(x)*sin(x))/2. 0
0, 1, 2, -89, -2668, 60541, 12497462, 330911491, -136964474008, -21093217440839, 2139299892644522, 1436807195496088351, 96866149734285315452, -134387439014403900337739, -47862471480153106563898018 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

MATHEMATICA

Tanh[ Tan[ x ]*Sin[ x ] ]/2 (* Even Part *)

CROSSREFS

A009815.

Sequence in context: A161676 A023302 A041967 * A076532 A157064 A058527

Adjacent sequences:  A024236 A024237 A024238 * A024240 A024241 A024242

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Extended with signs 03/97.

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Last modified February 16 17:11 EST 2012. Contains 205938 sequences.