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A009393
Expansion of log(1+tanh(x))/exp(x).
6
0, 1, -3, 6, -8, 5, -7, 70, -72, -1311, 1309, 49214, -49216, -2653547, 2653545, 196707438, -196707440, -19194804703, 19194804701, 2385684870742, -2385684870744, -367985503366779, 367985503366777, 68980888889771126, -68980888889771128
OFFSET
0,3
MATHEMATICA
Log[ 1+Tanh[ x ] ]/Exp[ x ]
CROSSREFS
Sequence in context: A354628 A340794 A345204 * A077857 A377594 A181165
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved