@article{JIS_2016__19_7_a5,
     author = {Cristea,  Ligia L. and Martinjak,  Ivica and Urbiha,  Igor},
     title = {Hyperfibonacci sequences and polytopic numbers},
     journal = {Journal of integer sequences},
     year = {2016},
     volume = {19},
     number = {7},
     zbl = {1348.05024},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2016__19_7_a5/}
}