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 A136929 #7 Apr 12 2024 09:51:26 %S A136929 0,3,30,300,3000,30000,30503,30903,300000,305030,309030,550503,950503, %T A136929 953903,3000000,3005003,3009003,3050300,3055003,3090300,5505030, %U A136929 9505030,9539030,30000000,30050030,30090030,30503000,30550030,30903000,55050300,95050300,95055003,95390300,300000000,300050003,300050503,300090003,300500300 %N A136929 Numbers k such that k and k^2 use only the digits 0, 3, 4, 5 and 9. %C A136929 Generated with DrScheme. %C A136929 See also A058429-A058430. - _M. F. Hasler_, Jan 24 2008 %H A136929 Jonathan Wellons, <a href="/A136929/b136929.txt">Table of n, a(n) for n = 1..352</a> %H A136929 J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived] %e A136929 950439335440903^2 = 903334930353345333433405455409. %K A136929 base,nonn %O A136929 1,2 %A A136929 Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008