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 A158917 #3 Mar 31 2012 10:26:14 %S A158917 3719,3917,7193,9173,17393,17939,19793,19973,31799,37199,37991,39371, %T A158917 39791,71399,79319,91397,93971,99173,99317,99713,113797,117193,119773, %U A158917 131797,133379,137993,139397,171937,177319,179173,179939,191137,191173,193337,193799,193937,199337,199739 %N A158917 Emirps using each of the digits 1, 3, 7, 9 at least once, but no others. %F A158917 A006567 INTERSECT A108386. %K A158917 nonn,base %O A158917 1,1 %A A158917 _Lekraj Beedassy_, Mar 30 2009 %E A158917 137993, 171937, 179939 etc. inserted by _R. J. Mathar_, Apr 04 2009