@article{JIS_2014__17_1_a2,
     author = {Mezroui,  Soufiane and Azizi,  Abdelmalek and Ziane,  M'hammed},
     title = {On a conjecture of {Farhi}},
     journal = {Journal of integer sequences},
     year = {2014},
     volume = {17},
     number = {1},
     zbl = {1317.11019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2014__17_1_a2/}
}