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 A157083 #7 Jul 22 2014 22:08:57 %S A157083 21013,21017,21019,21023,21059,21067,21089,31013,31019,31039,31069, %T A157083 31079,32027,32029,32057,32059,32069,32089,32159,32189,41017,41023, %U A157083 41039,41047,41057,42013,42017,42019,42023,42089,42139,42157,42169 %N A157083 Depression-type primes with five digits; from left to right digits decrease to and increase from the central digit. %C A157083 The sequence is finite, ending with [308] 98689. %Y A157083 Related sequence: A156116 %K A157083 nonn,base,fini %O A157083 1,1 %A A157083 _Ki Punches_, Feb 22 2009 %E A157083 Corrected and edited _Ki Punches_, Feb 26 2009