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 A158082 #14 Apr 29 2024 09:08:17 %S A158082 0,1,4,100,121,144,324,400,441,1024,1444,2304,2401,10000,10201,10404, %T A158082 12100,12321,14400,22201,23104,32041,32400,33124,40000,40401,44100, %U A158082 101124,102400,103041,110224,114244,121104,123201,130321,131044,144400,203401,204304,213444 %N A158082 Squares whose decimal expansion contains no digit greater than 4. %H A158082 Erich Friedman, <a href="https://erich-friedman.github.io/numbers.html">What's Special About This Number?</a> %t A158082 Select[Range[0, 1000]^2, Max[IntegerDigits[#]] <= 4 &] (* _Paolo Xausa_, Apr 29 2024 *) %Y A158082 Cf. A158304. %Y A158082 Intersection of A000290 and A007091. %K A158082 nonn,base %O A158082 1,3 %A A158082 _N. J. A. Sloane_, May 23 2010