A009650 Expansion of tan(log(1+x)*cosh(x)).

0, 1, -1, 7, -24, 195, -1455, 15181, -163128, 2091653, -28920645, 448752819, -7526839056, 137636522647, -2702715523235, 56982020356457, -1280413674123600, 30591670993049033, -773721824135574825

Offset

0,4

Links

Table of n, a(n) for n=0..18.

Mathematica

Tan[ Log[ 1+x ]*Cosh[ x ]]

Crossrefs

Sequence in context: A223007 A009646 A293489 * A111753 A198055 A012761

Adjacent sequences: A009647 A009648 A009649 * A009651 A009652 A009653

Keyword

sign,easy

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved