A024330 Expansion of tanh(log(1+x))*log(1+x)/2.

0, 0, 1, -3, 7, -10, -18, 168, 360, -19008, 262080, -2724480, 25194240, -232951680, 2505444480, -34676812800, 577980748800, -10296734515200, 185178186547200, -3347775973785600, 62005095419904000, -1204098364514304000

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: A352781 A342448 A365931 * 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