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A012148
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sec(tan(sin(x)))=1+1/2!*x^2+9/4!*x^4+153/6!*x^6+4337/8!*x^8...
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0
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1, 1, 9, 153, 4337, 188049, 11533497, 947095529, 100391885153, 13337306468001, 2164609458010345, 420395208704497849, 96150102074339268945, 25560738902667056074801, 7807205800461246020523161, 2710746396065167779192263433, 1059485323408621763305666629825
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OFFSET
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0,3
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LINKS
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MATHEMATICA
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With[{nn=40}, Take[CoefficientList[Series[Sec[Tan[Sin[x]]], {x, 0, nn}], x]Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Dec 23 2011 *)
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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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EXTENSIONS
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More terms from Harvey P. Dale, Dec 23 2011
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STATUS
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approved
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