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A024243
Expansion of tanh(sin(x)*x)/2.
1
0, 1, -2, -117, 3356, 176405, -25528806, -511975457, 554197425592, -35655181253847, -25582284242683210, 6598119430000033331, 1878722559559319754708, -1478103068989901067214787, -77274866172665629115051054
OFFSET
0,3
MATHEMATICA
Tanh[ Sin[ x ]*x ]/2 (* Even Part *)
CROSSREFS
Cf. A009800.
Sequence in context: A203607 A188977 A042681 * A307094 A379549 A147774
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
STATUS
approved