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 A135566 #3 Dec 05 2013 19:57:15 %S A135566 2,7,5,17,71,23,37,137,79,241,3,173,67,31,347,433,127,47,571,1069,107, %T A135566 227,229,853,647,271,83 %N A135566 Least prime not already in the sequence such that the n-th partial concatenation is a multiple of the n-th prime. %Y A135566 See A114025 for another version. %K A135566 base,nonn %O A135566 1,1 %A A135566 _Amarnath Murthy_, Nov 13 2005 %E A135566 More terms from _David Wasserman_, Mar 04 2008