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A024333
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Expansion of e.g.f: tanh(log(1+x)^2)/2.
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0
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0, 0, 1, -3, 11, -50, 154, 756, -25572, 434736, -6324264, 84312360, -1014504360, 9750096720, -26179417200, -2263442045760, 92224441646400, -2623899775526400, 64132749053646720, -1393649719639125120, 25953090802663939200, -339671851067737440000
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OFFSET
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0,4
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LINKS
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[Tanh[Log[1+x]^2]/2, {x, 0, nn}], x] Range[0, nn]!] (* _Harvey P. Dale_, Jun 22 2019 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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_R. H. Hardin_
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EXTENSIONS
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Extended with signs, Mar 1997
Definition clarified and prior Mathematica program replaced by ~~~
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STATUS
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approved
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