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 A030996 #26 Feb 18 2024 02:04:45 %S A030996 2,2,5,2,7,113,29,107,211,691,23,11,5,71,277,181,13,307,43,223,43,167, %T A030996 31,23,151,29,67,383,19,53,53,277,541,37,103,127,947,79,4409,1699,13, %U A030996 73,31,107,751,1187,1069,859,67,229,293,47,1303,2909,1319 %N A030996 Concatenation of n consecutive primes starting with the prime a(n) is a prime. %H A030996 Paolo P. Lava, <a href="/A030996/b030996.txt">Table of n, a(n) for n = 1..250</a> (terms 1..100 from Zak Seidov) %Y A030996 Cf. A000040, A030997. %K A030996 nonn,base %O A030996 1,1 %A A030996 _Patrick De Geest_, _Warut Roonguthai_ %E A030996 Edited by _Charles R Greathouse IV_, Apr 30 2010