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A009384 Expansion of log(1+tanh(sin(x))). 0
0, 1, -1, -1, 6, 1, -72, -1, 1904, 1, -89344, -1, 6445824, 1, -660602880, -1, 91175548928, 1, -16301080281088, -1, 3664597991424000, 1, -1011727950085619712, -1, 336514395583207178240, 1, -132722531082033166286848, -1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..27.

MATHEMATICA

Log[ 1+Tanh[ Sin[ x ] ] ]

CROSSREFS

Sequence in context: A134278 A049385 A266364 * A280520 A051151 A009330

Adjacent sequences:  A009381 A009382 A009383 * A009385 A009386 A009387

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified August 10 16:56 EDT 2020. Contains 336381 sequences. (Running on oeis4.)