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A058421 Numbers k such that k^2 contains only digits {0,1,8}, not ending with zero. 1

%I

%S 1,9,109,901,1009,9001,10009,10401,90001,100009,100901,900001,1000009,

%T 1004001,8954391,9000001,10000009,10009001,34351141,90000001,

%U 100000009,100040001,900000001,1000000009,1000090001,3163554991,9000000001

%N Numbers k such that k^2 contains only digits {0,1,8}, not ending with zero.

%H P. De Geest, <a href="http://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#018">Sporadic tridigital solutions</a>

%Y Cf. A058422.

%K nonn,base

%O 1,2

%A _Patrick De Geest_, Nov 15 2000

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Last modified August 5 15:15 EDT 2021. Contains 346472 sequences. (Running on oeis4.)