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 A242907 #4 May 26 2014 10:34:53 %S A242907 7,17,71,107,701,1087,8017,10487,10847,14087,18047,48017,70481,70841, %T A242907 78041,78401,80147,80471,81047,84017,84701,87041,100847,104087,184007, %U A242907 400187,400871,401087,407801,408071,408701,410087,410807,418007,470081,478001,480017 %N A242907 a(n+1) is the smallest prime > a(n) such that the digits of a(n) are all (with multiplicity) contained in the digits of a(n+1), with a(1)=7. %Y A242907 Cf. A242904, A242905, A242906. %K A242907 nonn,base %O A242907 1,1 %A A242907 _Michel Lagneau_, May 26 2014