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A013504
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sin(sec(x)-sech(x))=2/2!*x^2+2/6!*x^6-176158/10!*x^10...
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0
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2, 2, -176158, -1468303198, -23972242057918, -659094144077286718, -17783195610659060805598, 2907154691514883581324639842, 1898415071310817291664803882934402, 1068476725686706833449994431404467473282, 726967725616567229436454165277652418918762082
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OFFSET
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0,1
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LINKS
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MATHEMATICA
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With[{nn=50}, Take[CoefficientList[Series[Sin[Sec[x]-Sech[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 4}]] (* Harvey P. Dale, May 28 2021 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
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STATUS
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approved
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