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 A087595 #5 Dec 05 2013 19:56:32 %S A087595 13,101,1009,10009,100363,1000003,10000141,100000543,1000000007, %T A087595 10000000589,100000000447,1000000000063,10000000000609, %U A087595 100000000000721,1000000000000843,10000000000002547,100000000000000609 %N A087595 Smallest n-digit member of A087593. Define dd(k) = the number formed by concatenating the absolute difference of successive digits of k. Sequence contains smallest n-digit prime p such that dd(p) is also prime. %C A087595 Conjecture: Sequence is infinite. %e A087595 a(5) = 10009 and dd(10009) = 1009 is a prime. %Y A087595 Cf. A087593, A087594, A087596. %K A087595 base,nonn %O A087595 2,1 %A A087595 _Amarnath Murthy_, Sep 18 2003 %E A087595 More terms from _David Wasserman_, Jun 15 2005