%I #9 Apr 12 2024 09:51:26
%S 0,1,3,10,11,30,100,101,110,111,139,300,1000,1001,1010,1011,1100,1101,
%T 1110,1390,3000,10000,10001,10010,10011,10100,10101,10110,10111,10923,
%U 11000,11001,11010,11100,11101,13900,30000,30203,100000,100001,100010,100011,100100,100101,100110,100111,101000,101001,101010,101011,101100,101110,109139
%N Numbers k such that k and k^2 use only the digits 0, 1, 2, 3 and 9.
%C Generated with DrScheme.
%H Jonathan Wellons, <a href="/A136815/b136815.txt">Table of n, a(n) for n = 1..1138</a>
%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]
%e 302013293123^2 = 91212029222999119093129.
%t With[{c={0,1,2,3,9},nn=6},Select[FromDigits/@Tuples[c,nn],SubsetQ[ c,IntegerDigits[ #^2]]&]] (* _Harvey P. Dale_, Oct 10 2022 *)
%K base,nonn
%O 1,3
%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008