This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A136829 #7 Apr 12 2024 09:51:26 %S A136829 0,1,10,11,100,101,110,261,1000,1001,1010,1011,1100,1101,2610,10000, %T A136829 10001,10010,10011,10100,10110,10801,11000,11001,11010,11261,26100, %U A136829 26101,100000,100001,100010,100011,100100,100101,100110,101000,101001,101100,108010,110000,110001,110010,110100,112610,261000,261010,282881,816261,1000000,1000001 %N A136829 Numbers k such that k and k^2 use only the digits 0, 1, 2, 6 and 8. %C A136829 Generated with DrScheme. %H A136829 Jonathan Wellons, <a href="/A136829/b136829.txt">Table of n, a(n) for n = 1..1019</a> %H A136829 J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived] %e A136829 1062168010261^2 = 1128200882021811801288121. %K A136829 base,nonn %O A136829 1,3 %A A136829 Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008