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A024330 Expansion of tanh(log(1+x))*log(1+x)/2. 0
0, 0, 1, -3, 7, -10, -18, 168, 360, -19008, 262080, -2724480, 25194240, -232951680, 2505444480, -34676812800, 577980748800, -10296734515200, 185178186547200, -3347775973785600, 62005095419904000, -1204098364514304000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..21.

MATHEMATICA

Tanh[ Log[ 1+x ] ]*Log[ 1+x ]/2

CROSSREFS

Cf. A009779.

Sequence in context: A098001 A171071 A265724 * A069153 A167390 A000223

Adjacent sequences:  A024327 A024328 A024329 * A024331 A024332 A024333

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs, Mar 1997

STATUS

approved

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Last modified April 19 19:00 EDT 2019. Contains 322290 sequences. (Running on oeis4.)