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A009693 Expansion of tan(tan(tanh(x))). 0
1, 2, 8, 48, -256, -6656, 930816, -94216192, 9099706368, -822565076992, 27885670498304, 20948024601608192, -10620485000782413824, 3800373452911396519936, -1166459964091299721641984 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Table of n, a(n) for n=0..14.
MATHEMATICA
Tan[ Tan[ Tanh[ x ] ] ] (* Odd Part *)
CROSSREFS
Sequence in context: A292277 A173841 A004141 * A192251 A104190 A152661
Adjacent sequences: A009690 A009691 A009692 * A009694 A009695 A009696
KEYWORD
sign
AUTHOR
R. H. Hardin
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved

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Last modified May 20 16:51 EDT 2024. Contains 372719 sequences. (Running on oeis4.)