Using Noonan-Zeilberger Functional Equations to enumerate (in polynomial time!) generalized Wilf classes. - Brian Nakamura; Doron Zeilberger (Adv. Appl. Math., 2013)

Using functional equations to enumerate 1324-avoiding permutations. - Fredrik Johansson 001; Brian Nakamura (Adv. Appl. Math., 2014)