A024288 Expansion of log(1+tanh(x)*sinh(x))/2.

0, 1, -8, 211, -11108, 985501, -132845558, 25350487891, -6508214949608, 2163722040149881, -904419413432969258, 464250155924655691471, -287099441049791660680508, 210529197284459655378072661, -180624991973581098090900739358, 179251232453786124708955804893451

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 A221042 A358211

Adjacent sequences: A024285 A024286 A024287 * A024289 A024290 A024291

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs Mar 1997

Status

approved