@article{05576441,
title = {Counting nondecreasing integer sequences that Lie below a barrier.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {16},
year = {2009},
zbl = {1187.05013},
language = {en},
url = {http://dml.mathdoc.fr/item/05576441}
}
Pemantle, Robin; Wilf, Herbert S. Counting nondecreasing integer sequences that Lie below a barrier.. The Electronic Journal of Combinatorics [electronic only], Tome 16 (2009) . http://gdmltest.u-ga.fr/item/05576441/