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 A117723 #3 Feb 27 2009 03:00:00 %S A117723 0,1,112,121,211,1111113,1111131,1111311,1113111,1131111,1311111, %T A117723 3111111,11111111111122,11111111111212,11111111111221,11111111112112, %U A117723 11111111112121,11111111112211,11111111121112,11111111121121 %N A117723 Numbers for which the product of the digits is the square root of the sum of the digits. %e A117723 1111113 is in the sequence because (1)the product of its digits is 1*1*1*1*1*1*3=3,(2)the sum of its digits is 1+1+1+1+1+1+3=9 and 3 is the square root of 9. %K A117723 base,nonn %O A117723 1,3 %A A117723 Luc Stevens (lms022(AT)yahoo.com), Apr 13 2006