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A024233 Expansion of tan(tanh(x))*sin(x)/2. +0
1
0, 1, -2, -21, 668, -8363, -597350, 76652415, -5349200200, 94006240681, 53961261562294, -13137846911653101, 1863043894828247636, -101535637135541768963, -32156707726436068717742 (list; graph; listen)
OFFSET

0,3

MATHEMATICA

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

CROSSREFS

A009717.

Sequence in context: A060319 A095224 A034984 this_sequence A015209 A113083 A139164

Adjacent sequences: A024230 A024231 A024232 this_sequence A024234 A024235 A024236

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Extended with signs 03/97.

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.


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