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A012927
Expansion of e.g.f. tan(tan(x) + log(x+1)).
0
0, 2, -1, 20, -54, 932, -5670, 99648, -1005704, 19127984, -273119400, 5764554528, -106046677968, 2504052726944, -55986392252336, 1478337150849408, -38674242587249280, 1136792156499528448
OFFSET
0,2
EXAMPLE
2*x - 1/2!*x^2 + 20/3!*x^3 - 54/4!*x^4 + 932/5!*x^5 ...
MATHEMATICA
With[{nn=20}, Rest[CoefficientList[Series[Tan[Tan[x]+Log[x+1]], {x, 0, nn}], x]Range[0, nn]!]] (* Harvey P. Dale, Oct 06 2011 *)
CROSSREFS
Sequence in context: A353914 A353873 A283620 * A013158 A012932 A013163
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
a(0) inserted and title improved by Sean A. Irvine, Jul 27 2018
STATUS
approved