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 A164837 #4 Mar 31 2012 19:54:08 %S A164837 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89, %T A164837 97,101,103,107,109,127,149,163,167,181,223,227,229,241,263,269,281, %U A164837 283,307,347,349,367,383,389,401,409,421,443,449,461,463,467,487,503,509 %N A164837 a(n) is a prime number such that every k-digit substring ( k < n ) taken from the left, is divisible by k. %e A164837 269 is a member since 2 is divisible by 1 and 26 is divisible by 2. %K A164837 nonn,base %O A164837 1,1 %A A164837 _Gaurav Kumar_, Aug 28 2009