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 A081356 #8 Mar 31 2012 13:20:45 %S A081356 0,2,4,17,33,144,317,1439,3167,14144,31624,141442,316229,1414234, %T A081356 3162922,14142148,31622888,141422444,316292397,1414213838,3162353552, %U A081356 14142137977,31622912229,141421462429,316228884988,1414214626248 %N A081356 Least m such that A081355(m)=LD(m,m^2)=n, where LD(x,y) denotes the Levenshtein distance between x and y in decimal representation. %H A081356 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_] %e A081356 a(4)=33, as A081355(33)=LD(33,33^2)=LD(33,1089)=4 and A081355(m)<4 for m<=33. %K A081356 nonn,base %O A081356 0,2 %A A081356 _Reinhard Zumkeller_, Mar 18 2003 %E A081356 More terms from _David Wasserman_, Jun 01 2004