A024298 Expansion of log(1+tanh(x)*sin(x))/2.

0, 1, -12, 371, -23212, 2462221, -397812162, 91074108971, -28061144757112, 11197923936924121, -5618483731461136062, 3461958000431478483671, -2569952518351298130757012, 2262189462485360615989843621, -2329800142118914687262408707962

Offset

0,3

Links

Table of n, a(n) for n=0..14.

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Log[1+Tanh[x]*Sin[x]]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Aug 30 2016 *)

Crossrefs

Cf. A009396.

Sequence in context: A218310 A268550 A235685 * A177112 A081021 A269609

Adjacent sequences: A024295 A024296 A024297 * A024299 A024300 A024301

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs Mar 1997

Previous Mathematica program replaced by Harvey P. Dale, Aug 30 2016

Status

approved