Restricted Stirling permutations
  In this paper, we study the generating functions for the number of pattern restricted Stirling permutations with a given number of plateaus, descents and ascents. Properties of the generating functions, including symmetric properties and explicit formulas are studied. Combinatorial explanations are given for some equidistributions. 
David Callan, Shi-Mei Ma, Toufik Mansour
math.CO