@article{10_37236_286,
     author = {Jacob Steinhardt},
     title = {Permutations with ascending and descending blocks},
     journal = {The electronic journal of combinatorics},
     year = {2010},
     volume = {17},
     doi = {10.37236/286},
     zbl = {1215.05007},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/286/}
}