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 A071261 #13 Apr 17 2018 23:09:12 %S A071261 1,10,37,206,1401,10626,85316,712597,6117420,53593619,476889480, %T A071261 4295913223,39084524707,358521889961,3311439169717,30765562102926, %U A071261 287282165065268,2694418859703791,25368958219747617 %N A071261 Smallest k such that |p(k)-c(k)| is an n-digit number where p(k) is the k-th prime and c(k) is the k-th composite number. %Y A071261 Cf. A038529. %K A071261 hard,more,nonn,base %O A071261 1,2 %A A071261 _Amarnath Murthy_, May 30 2002 %E A071261 Corrected and extended by Gabriel Cunningham (gcasey(AT)mit.edu), Apr 08 2003 %E A071261 More terms from _Sean A. Irvine_, Nov 30 2009 %E A071261 a(12)-a(15) from _Donovan Johnson_, Dec 30 2010 %E A071261 a(16)-a(19) from _Chai Wah Wu_, Apr 17 2018