A053968 - OEIS

%I #18 Aug 11 2024 14:41:32

%S 24,26,76,869924,2582184474,75349689155076,75879284173334,

%T 815816631091556424,881854102200458483334,2562353735836753390526

%N Numbers k such that k^2 contains only digits {5,6,7}.

%H P. De Geest, <a href="https://www.worldofnumbers.com/threedigits.htm">Squares containing at most three distinct digits, Index entries for related sequences</a>

%H Author?, <a href="http://web.archive.org/web/20080708203024/http://blue.kakiko.com/mmrmmr/htm/eqtn06.html">Source</a>(<a href="http://web.archive.org/web/20060426155831/http://blue.kakiko.com/mmrmmr/txt/eqtn06.txt">txt</a>)

%H H. Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#567">Squares consisted of 3 different digits</a>

%Y Cf. A053969.

%K nonn,base,more

%O 1,1

%A _Patrick De Geest_, Mar 15 2000

%E More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005

%E Two more terms from _Jon E. Schoenfield_, Sep 04 2006

%E Three more terms from Mishima's website added by _Max Alekseyev_, May 02 2011