Andre' permutations, right-to-left and left-to-right minima
  We provide enumerative results concerning right-to-left minima and left- to-right minima in Andre' permutations of the first and second kind. For both the two kinds, the distribution of right-to-left and left-to-right minima is the same. We provide generating functions and associated asymptotics results. Our approach is based on the tree-structure of Andre' permutations. 
Filippo Disanto
math.CO