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 A091091 #7 Feb 16 2025 08:32:52 %S A091091 0,1,5,6,8,11,13,16,17,18,19,33,35,38,40,56,60,74,122,123,133,143,146, %T A091091 164,168,173,299,350,365,429,497,515,527,564,566,593,608,611,710,1031, %U A091091 1050,1052,1059,1088,1089,1090,1092,1096,1105,1287,1301,1316,1322 %N A091091 Numbers needing in binary and ternary representation an equal minimal number of editing steps (delete, insert or substitute) to transform them into their square. %C A091091 A091092(a(n)) = A091093(a(n)). %H A091091 Michael Gilleland, <a href="http://www.merriampark.com/ld.htm">Levenshtein Distance</a> [It has been suggested that this algorithm gives incorrect results sometimes. - _N. J. A. Sloane_] %H A091091 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SquareNumber.html">Square Number</a> %H A091091 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Binary.html">Binary</a> %H A091091 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Ternary.html">Ternary</a> %Y A091091 Cf. A007088, A001737, A007089, A001738, A000290. %K A091091 nonn,base %O A091091 1,3 %A A091091 _Reinhard Zumkeller_, Dec 18 2003