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 A127781 #6 Mar 30 2012 16:50:40 %S A127781 1,3,7,23,29,157,907,8471621,261369371 %N A127781 Last term of arithmetic progression of numbers with same prime signature described in A113460. %H A127781 <a href="/index/Pri#primes_AP">Index entries for sequences related to primes in arithmetic progressions</a> %Y A127781 Apart from leading term, agrees with A120302 for many terms. Where is the first difference? %K A127781 nonn,more %O A127781 1,2 %A A127781 _N. J. A. Sloane_, Oct 17 2007