A009384 Expansion of log(1+tanh(sin(x))).

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

Offset

0,5

Links

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

Mathematica

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

Crossrefs

Sequence in context: A049385 A266364 A356653 * 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