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A009657
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Expansion of tan(sin(sin(x))).
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0
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1, 0, -12, 88, 4176, -238912, -1798976, 1359954560, -82934087424, -12122717059072, 3176281608315904, -22431206333925376, -144730933261140701184, 27574419119401032040448, 6996748839515967274205184
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history;
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OFFSET
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0,3
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LINKS
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Table of n, a(n) for n=0..14.
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[Tan[Sin[Sin[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jan 15 2020 *)
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CROSSREFS
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Sequence in context: A155635 A126507 A181704 * A012088 A083825 A181944
Adjacent sequences: A009654 A009655 A009656 * A009658 A009659 A009660
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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 by Olivier Gérard, Mar 15 1997
Previous Mathematica program replaced by Harvey P. Dale, Jan 15 2020
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STATUS
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approved
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