A009347 Expansion of log(1+sinh(sinh(x))).

0, 1, -1, 4, -14, 76, -472, 3592, -31600, 317968, -3600384, 45286528, -626654976, 9459412288, -154690373632, 2724254181760, -51403730941952, 1034595588065536, -22124602307346432, 500961002883890176

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 * A341505 A231510 A161132

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