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A009263 Expansion of exp(tanh(x)).x. 0
0, 1, 2, 3, -4, -35, -18, 679, 2200, -18567, -150150, 587499, 11618004, -9780459, -1078005082, -2502478065, 118928710576, 742659420913, -15184771406478, -178572619407021, 2148536703814700, 44455465546363725 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

FORMULA

n * A003723(n-1). - Ralf Stephan (ralf(AT)ark.in-berlin.de), Sep 01 2003

MATHEMATICA

Exp[ Tanh[ x ] ]*x

CROSSREFS

Sequence in context: A074920 A180631 A102842 * A084314 A078394 A037326

Adjacent sequences:  A009260 A009261 A009262 * A009264 A009265 A009266

KEYWORD

sign,easy

AUTHOR

R. H. Hardin (rhhardin(AT)att.net)

EXTENSIONS

Extended with signs Mar 15 1997 by Olivier Gerard.

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Last modified February 15 08:20 EST 2012. Contains 205729 sequences.