Geodesic
On Obláth's problem
Journal of integer sequences, Tome 6 (2003) no. 3
In this paper we determine those squares whose decimal representation consists of $k >= 2$ digits such that $k-1$ of them equal. Full version: pdf, dvi, ps, latex
Classification : 11A63, 11D09, 11D61
Keywords: square, equal digits, pell equation (Concerned with sequence 1 
@article{JIS_2003__6_3_a7,
     author = {Gica,  Alexandru and Panaitopol,  Lauren\c{t}iu},
     title = {On {Obl\'ath's} problem},
     journal = {Journal of integer sequences},
     year = {2003},
     volume = {6},
     number = {3},
     zbl = {1040.11003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2003__6_3_a7/}
}
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Gica,  Alexandru; Panaitopol,  Laurenţiu. On Obláth's problem. Journal of integer sequences, Tome 6 (2003) no. 3. http://geodesic.mathdoc.fr/item/JIS_2003__6_3_a7/