Journal of Integer Sequences, Vol. 6 (2003), Article 03.3.5

On Obláth's Problem

Alexandru Gica and Laurentiu Panaitopol
Department of Mathematics
University of Bucharest
Str. Academiei 14
RO--70109 Bucharest 1
Romania

Abstract:
In this paper we determine those squares whose decimal representation consists of k >= 2 digits such that k-1 of them equal.

(Concerned with sequence A018885 .)

Received March 12, 2003; revised version received September 15, 2003. Published in Journal of Integer Sequences October 2, 2003.