A note on a q-extension of ballot numbers

Journal of Combinatorial Theory - Tập 4 - Trang 191-193 - 1968
John Riordan1
1Bell Telephone Laboratoies, Incorporated Murray Hill, New Jersey 07971, USA

Tài liệu tham khảo

Carlitz, 1964, Two Element Lattice Permutation Numbers and Their Q-Generalization, Duke Math. J., 31, 371, 10.1215/S0012-7094-64-03136-9 de Bruijn, 1965, Math. Reviews, 29, 2752