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A009645 Expansion of e.g.f.: tan(log(1+x))*log(1+x). 1
0, 0, 2, -6, 30, -180, 1324, -11424, 113376, -1271232, 15889280, -218989760, 3298513600, -53897151360, 949389619840, -17931842342400, 361486218406400, -7746121344512000, 175813073606092800, -4213227577441536000 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
a(n) ~ n! * (-1)^n * Pi / (2 * (exp(Pi/2)-1) * (1-exp(-Pi/2))^n). - Vaclav Kotesovec, Jan 23 2015
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Tan[Log[1+x]]*Log[1+x], {x, 0, nn}], x]Range[0, nn]!] (* Harvey P. Dale, Aug 16 2012 *)
CROSSREFS
Sequence in context: A096769 A365975 A111059 * A274966 A293653 A246541
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Definition clarified by Harvey P. Dale, Aug 16 2012
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)