A simple bijection between binary trees and colored ternary trees. Sun, Yidong — 2010 The Electronic Journal of Combinatorics [electronic only]
λ -factorials of n . Sun, Yidong; Zhuang, Jujuan — 2010 The Electronic Journal of Combinatorics [electronic only]
Excedance numbers for permutations in complex reflection groups. Mansour, Toufik; Sun, Yidong — 2007 Séminaire Lotharingien de Combinatoire [electronic only]
Motzkin numbers of higher rank: generating function and explicit expression. Mansour, Toufik; Schork, Matthias; Sun, Yidong — 2007 Journal of Integer Sequences [electronic only]