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A024261
Expansion of log(1+tan(x)*sin(x))/2.
0
0, 1, -4, 91, -3004, 204061, -19378954, 2719355731, -504005966104, 122050103412601, -37013909750634454, 13810412109218174671, -6202801292273010744004, 3304722240330810208121941
OFFSET
0,3
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Log[1+Tan[x]*Sin[x]]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Aug 28 2019 *)
CROSSREFS
Cf. A009377.
Sequence in context: A374158 A195559 A195551 * A337827 A129434 A248041
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs, Mar 1997
Prior Mathematica program replaced by Harvey P. Dale, Aug 28 2019
STATUS
approved