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A009617
Expansion of tanh(tan(x))*sin(x)/2.
0
1, 116, 202576, 1557978176, 34206677698816, 1706222428480541696, 167325183704890858786816, 29168516299952885066683006976, 8389219957754997383106354075467776
OFFSET
0,2
MATHEMATICA
Sinh[ Tanh[ x ]*Tan[ x ] ]/2 (* [ x^(4n+2) ] *)
CROSSREFS
Cf. A012671.
Sequence in context: A296360 A035814 A284377 * A201728 A009687 A373582
KEYWORD
nonn
AUTHOR
EXTENSIONS
Extended and signs tested 03/97.
STATUS
approved