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A009674
Expansion of tan(sin(x)/cosh(x)).
0
1, -2, -28, 1160, -3504, -3908896, 360691008, 14544047232, -11198480094976, 1531305962216960, 340347851378082816, -234547726326061201408, 32383387692585279868928, 30186184832886791121723392
OFFSET
0,2
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Tan[Sin[x]/Cosh[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Mar 06 2017 *)
CROSSREFS
Sequence in context: A113633 A186491 A300459 * A143598 A324077 A071220
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Prior Mathematica program replaced by Harvey P. Dale, Mar 06 2017
STATUS
approved