@article{10_37236_149,
     author = {Robin Pemantle and Herbert S. Wilf},
     title = {Counting nondecreasing integer sequences that {Lie} below a barrier},
     journal = {The electronic journal of combinatorics},
     year = {2009},
     volume = {16},
     number = {1},
     doi = {10.37236/149},
     zbl = {1187.05013},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/149/}
}