|
%I #9 Apr 12 2024 09:51:26
%S 0,1,10,11,100,101,110,1000,1001,1010,1011,1100,1101,10000,10001,
%T 10010,10011,10100,10110,11000,11001,11010,100000,100001,100010,
%U 100011,100100,100101,100110,101000,101001,101100,110000,110001,110010,110100,1000000,1000001,1000010,1000011,1000100,1000101,1000110,1001000,1001010,1001100,1010000
%N Numbers k such that k and k^2 use only the digits 0, 1, 2 and 6.
%C Generated with DrScheme.
%H Jonathan Wellons, <a href="/A136827/b136827.txt">Table of n, a(n) for n = 1..1418</a>
%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]
%e 101001020100101^2 = 10201206061261006216060210201.
%t With[{c={0,1,2,6}},Select[FromDigits/@Tuples[c,7],SubsetQ[c, IntegerDigits[ #^2]]&]] (* _Harvey P. Dale_, Jul 04 2019 *)
%K base,nonn,changed
%O 1,3
%A Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
|
