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A024228 Expansion of tanh(x)*tan(sin(x))/2. 0
0, 1, -2, 19, -900, 24677, -1112326, 106703735, -9757606664, 1107210680265, -185352374028298, 34591783336998875, -7446994657977107084, 2008734448727225846317, -618914330538196467929358 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[Tanh[x]*Tan[Sin[x]]/2, {x, 0, nn}], x]Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Apr 27 2012 *)
CROSSREFS
Cf. A009835.
Sequence in context: A012980 A323280 A013110 * A015191 A165937 A128345
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
STATUS
approved

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Last modified July 21 13:28 EDT 2024. Contains 374474 sequences. (Running on oeis4.)