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A009347 Expansion of log(1+sinh(sinh(x))). 0
0, 1, -1, 4, -14, 76, -472, 3592, -31600, 317968, -3600384, 45286528, -626654976, 9459412288, -154690373632, 2724254181760, -51403730941952, 1034595588065536, -22124602307346432, 500961002883890176 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..19.

MATHEMATICA

Log[ 1+Sinh[ Sinh[ x ] ] ]

CROSSREFS

Sequence in context: A007282 A222900 A222485 * A231510 A161132 A186638

Adjacent sequences:  A009344 A009345 A009346 * A009348 A009349 A009350

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 February 18 09:15 EST 2020. Contains 332011 sequences. (Running on oeis4.)