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A012684
tanh(tanh(x)*arctan(x))=2/2!*x^2-16/4!*x^4+80/6!*x^6+14464/8!*x^8...
0
2, -16, 80, 14464, -1924352, 182456320, -4821633024, -5022496751616, 2274499602284544, -641508042469015552, 58440162971714846720, 91048038738283980652544, -93320295604487977397387264
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OFFSET
0,1
LINKS
Table of n, a(n) for n=0..12.
CROSSREFS
Sequence in context:
A336174
A045905
A012680
*
A234004
A053587
A052346
Adjacent sequences:
A012681
A012682
A012683
*
A012685
A012686
A012687
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved
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Last modified August 27 19:37 EDT 2024. Contains 375471 sequences. (Running on oeis4.)