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 A058412 #16 Aug 11 2024 14:41:33
%S A058412 1,121,10201,22201,1002001,1022121,1212201,100020001,100220121,
%T A058412 121022001,210221001,10000200001,10002200121,10020210201,10201202001,
%U A058412 12100220001,100021020121,1000002000001,1000022000121,1000202010201
%N A058412 Squares composed of digits {0,1,2}, not ending with zero.
%C A058412 All terms but the first one have their largest digit equal to 2, cf. A277946 = A277959^2. - _M. F. Hasler_, Nov 15 2017
%H A058412 P. De Geest, <a href="https://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>
%H A058412 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Sporadic tridigital solutions</a>
%H A058412 <a href="/index/Sq#squares">OEIS Index to sequences related to squares</a>.
%F A058412 a(n) = A058411(n)^2. - _Zak Seidov_, Jul 01 2013
%o A058412 (PARI) apply( t->t^2, vector(100,i,N=if(i>1,next_A058411(N),1))) \\ _M. F. Hasler_, Nov 15 2017
%Y A058412 Cf. A058411.
%Y A058412 Cf. A063009, A066139. - _Zak Seidov_, Jul 01 2013
%Y A058412 Cf. A136808, A136809 and A136810, ..., A137147 for other digit combinations.
%Y A058412 See also A277946 = A277959^2 = squares whose largest digit is 2.
%Y A058412 The first 1261 terms are also a subsequence of A278038 (binary numbers without '111'), in turn a subsequence of the binary numbers A007088.
%K A058412 nonn,base
%O A058412 1,2
%A A058412 _Patrick De Geest_, Nov 15 2000