Animals and 2-Motzkin paths.
Woan, Wen-jin
Journal of Integer Sequences [electronic only], Tome 8 (2005), / Harvested from The Electronic Library of Mathematics
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Publié le : 2005-01-01
EUDML-ID : urn:eudml:doc:52926 
@article{05068448,
     title = {Animals and 2-Motzkin paths.},
     journal = {Journal of Integer Sequences [electronic only]},
     volume = {8},
     year = {2005},
     zbl = {1103.05008},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05068448}
}

Woan, Wen-jin. Animals and 2-Motzkin paths.. Journal of Integer Sequences [electronic only], Tome 8 (2005) . http://gdmltest.u-ga.fr/item/05068448/