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A024288 Expansion of log(1+tanh(x)*sinh(x))/2. 0
0, 1, -8, 211, -11108, 985501, -132845558, 25350487891, -6508214949608, 2163722040149881, -904419413432969258, 464250155924655691471, -287099441049791660680508, 210529197284459655378072661, -180624991973581098090900739358, 179251232453786124708955804893451 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..15.

MATHEMATICA

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

CROSSREFS

Cf. A009397.

Sequence in context: A197596 A197980 A197767 * A081794 A048433 A221042

Adjacent sequences:  A024285 A024286 A024287 * A024289 A024290 A024291

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs Mar 1997

STATUS

approved

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Last modified February 15 22:28 EST 2019. Contains 320138 sequences. (Running on oeis4.)