Geodesic
From a School Question to a Problem for Students
Matematičeskoe obrazovanie, no. 3 (2005), pp. 51-57 
P. I. Samovol; M. Applebaum. From a School Question to a Problem for Students. Matematičeskoe obrazovanie, no. 3 (2005), pp. 51-57. http://geodesic.mathdoc.fr/item/MO_2005_3_a3/
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     title = {From a {School} {Question} to a {Problem} for {Students}},
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     year = {2005},
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     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2005_3_a3/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

The authors analyse different generalizations of a simple problem on existence of a number sequence with a prescribed "unusual" property.