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A009170 Expansion of cosh(tanh(x))/exp(x). 0
1, -1, 2, -4, 0, 24, 8, -456, 192, 11264, -20480, -289664, 1837696, -3000960, -187743488, 2697206272, 22698672128, -625547980800, -3236847570944, 138214081974272, 536307107184640, -32824743592198144, -101121059849109504 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MATHEMATICA
Cosh[ Tanh[ x ] ]/Exp[ x ]
CROSSREFS
Sequence in context: A173315 A205975 A231915 * A009625 A308024 A347281
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved

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Last modified June 18 11:09 EDT 2024. Contains 373481 sequences. (Running on oeis4.)