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A012775
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E.g.f.: arctan(sec(x)*log(x+1)) = x - 1/2!*x^2 + 3/3!*x^3 - 37/5!*x^5 + 345/6!*x^6 - ...
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0
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0, 1, -1, 3, 0, -37, 345, -1967, 2296, 122093, -2157165, 21241847, -62837544, -2704412921, 74329911565, -1080320786971, 5480675823120, 220652162236409, -8577532338045273, 168598543971458059, -1306206271210775920, -46736993299592412013
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listen;
history;
text;
internal format)
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OFFSET
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0,4
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LINKS
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Table of n, a(n) for n=0..21.
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[ArcTan[Sec[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 10 2013 *)
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CROSSREFS
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Sequence in context: A058833 A266168 A276913 * A157308 A157310 A172396
Adjacent sequences: A012772 A012773 A012774 * A012776 A012777 A012778
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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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a(0) prepended and definition clarified by Harvey P. Dale, Dec 10 2013
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STATUS
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approved
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