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A139134
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a(n) = n-th derivative of Sec(Exp(z)-1) at z=0.
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4
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1, 0, 1, 3, 12, 65, 417, 3094, 26243, 250371, 2652754, 30910935, 392895789, 5409783392, 80214503397, 1274329677391, 21594115259540, 388790596531173, 7411710847692157, 149142571391245758, 3159081458947418511
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OFFSET
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0,4
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LINKS
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FORMULA
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E.G.F. = sec(exp(z)-1)
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MATHEMATICA
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Table[D[Sec[Exp[x] - 1], {x, n}] /. x -> 0, {n, 0, 30}]
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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Richard Chapling (r.chappers(AT)gmail.com), Jun 05 2008
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EXTENSIONS
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STATUS
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approved
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