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A024299 Expansion of log(1+tanh(x)^2)/2. 3
0, 1, -14, 496, -34544, 4055296, -724212224, 183218384896, -62380415842304, 27507260369207296, -15250924309151350784, 10384039093607251050496, -8517991922318587187953664, 8285309769460200661892202496, -9429010285390912531529354706944 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..14.

MATHEMATICA

Log[ 1+Tanh[ x ]^2 ]/2 (* Even Part *)

CROSSREFS

Cf. A009403.

Cf. A003707, A101921.

Sequence in context: A217337 A251867 A240411 * A190999 A320288 A233014

Adjacent sequences:  A024296 A024297 A024298 * A024300 A024301 A024302

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs, Mar 1997

STATUS

approved

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Last modified October 16 20:34 EDT 2018. Contains 316275 sequences. (Running on oeis4.)