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 A009827 Expansion of tanh(x)*cosh(log(1+x)). 1
 0, 1, 0, 1, -12, 56, -240, 1744, -16128, 143296, -1353600, 14972288, -183912960, 2385640960, -33085817856, 496732177408, -7978174955520, 135579928592384, -2436661138489344, 46303359719833600, -926648972098928640 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 FORMULA a(n) ~ n! * (-1)^(n+1) * tanh(1) / 2. - Vaclav Kotesovec, Jan 24 2015 MATHEMATICA With[{nn=20}, CoefficientList[Series[Tanh[x]Cosh[Log[1+x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 04 2011 *) CROSSREFS Sequence in context: A009430 A035289 A275505 * A068418 A068414 A199316 Adjacent sequences:  A009824 A009825 A009826 * A009828 A009829 A009830 KEYWORD sign,easy AUTHOR EXTENSIONS Extended with signs by Olivier Gérard, Mar 15 1997 Prior incomplete Mathematica program deleted by Harvey P. Dale, Dec 04 2011 STATUS approved

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Last modified September 16 07:19 EDT 2021. Contains 347469 sequences. (Running on oeis4.)