A053904 - OEIS

%I #13 Aug 11 2024 14:41:32

%S 1,9,109,296848141,4341833151859,3399291958357679641,

%T 2412237158970509643109

%N Numbers k such that k^2 contains only digits {1,5,8}.

%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 H. Mishima <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Squares consisted of 3 different digits</a> [From _Max Alekseyev_, May 21 2009]

%Y Cf. A053905.

%K nonn,base,more

%O 1,2

%A _Patrick De Geest_, Mar 15 2000

%E One more term from _Jon E. Schoenfield_, Sep 03 2006

%E Two more terms from Mishima's webpage added by _Max Alekseyev_, May 21 2009