A009342 Expansion of log(1+sin(x)/cosh(x)).

0, 1, -1, -2, 10, -20, -16, 488, -4080, 22160, -7936, -1616672, 22996480, -172976960, -22368256, 25518205568, -485458114560, 4964227109120, -209865342976, -1231298393825792, 29816107240652800, -379260096755225600

Offset: 0

Author

R. H. Hardin

Keywords

• sign
• easy

Crossrefs

Cf. A012816.

Programs

Mathematica

Log[ 1+Sin[ x ]/Cosh[ x ] ]

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997