Context-free grammars for several polynomials associated with Eulerian   polynomials
  In this paper, we present grammatical descriptions of several polynomials associated with Eulerian polynomials, including q-Eulerian polynomials, alternating run polynomials and derangement polynomials. As applications, we get several convolution formulas involving these polynomials. 
Shi-Mei Ma, Jun Ma, Yeong-Nan Yeh, Bao-Xuan Zhu
math.CO