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Squares composed of digits {0,1,5}, not ending with zero.
2

%I #6 Aug 11 2024 14:41:33

%S 1,5550101001,15500001001,115501010001005110501011001,

%T 555115055501101055005101001,550015110551505101015151115110001

%N Squares composed of digits {0,1,5}, not ending with zero.

%H P. De Geest, <a href="https://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>

%H Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Sporadic tridigital solutions</a>

%Y Cf. A058415.

%K nonn,base,more

%O 1,2

%A _Patrick De Geest_, Nov 15 2000