见http://cran.r-project.org/web/views/Distributions.html 有详细列表
然后名字是Logarithmic distribution（见http://en.wikipedia.org/wiki/Logarithmic_distribution）：
Logarithmic distribution : This can be found in VGAM and gamlss.dist. A fast random generator is available for the logarithmic distribution is implemented in Runuran as well as the 'density' function.
