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 A111950 #21 Apr 22 2025 08:03:24 %S A111950 3,5,5,9419,909287,325267931,678771479,1107819732821,170669145704411, %T A111950 3324648277099157,789795449254776509 %N A111950 Smallest order n twin prime cluster. %D A111950 Paulo Ribenboim, The Little Book of Bigger Primes, Springer-Verlag NY 2004. See p. 196. %H A111950 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TwinPrimeCluster.html">Twin Prime Cluster</a>. %Y A111950 Cf. A087641. %K A111950 nonn,more %O A111950 1,1 %A A111950 _Eric W. Weisstein_, Aug 22 2005 %E A111950 a(11) from Tomáš Brada, added by _Dmitry Petukhov_, Aug 18 2023