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A003700
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Expansion of tan(x /cosh(x)).
(Formerly M5080)
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0
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1, -1, -19, 475, 1753, -1109769, 70784325, 2711086547, -1376283649103, 148592152807663, 21812320857733789, -12754009647903010101, 1675171082535404962441, 847081835857552788679655
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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MATHEMATICA
| Tan[ x/Cosh[ x ] ] (* Odd Part *)
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CROSSREFS
| Sequence in context: A012506 A201798 A081686 * A093975 A159248 A201711
Adjacent sequences: A003697 A003698 A003699 * A003701 A003702 A003703
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KEYWORD
| sign
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), N. J. A. Sloane (njas(AT)research.att.com), Simon Plouffe (simon.plouffe(AT)gmail.com)
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