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 A225683 #7 May 19 2013 17:02:12 %S A225683 1,10,11,12,13,14,15,16,17,18,19,20,24,28,36,48,50,100,101,102,103, %T A225683 104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120, %U A225683 121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150 %N A225683 Numbers divisible by their first digit squared. %C A225683 Added for completeness. A221651 is a much more interesting version. %Y A225683 Cf. A221651. %K A225683 nonn,base %O A225683 1,2 %A A225683 _N. J. A. Sloane_, May 19 2013