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A013420
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sec(arcsin(x)-arcsinh(x))=1+40/6!*x^6+108000/10!*x^10+1232000/12!*x^12...
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0
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1, 0, 0, 40, 0, 108000, 1232000, 1647734400, 57657600000, 85927162048000, 6053574009600000, 11452742596189440000, 1349295190949488640000, 3261229190521061760000000, 577775664177165642240000000
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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}, Take[CoefficientList[Series[Sec[ArcSin[x]-ArcSinh[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, May 05 2021 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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STATUS
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approved
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