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 A302143 #7 Apr 02 2018 21:02:50 %S A302143 3,13,191,857 %N A302143 Primes p such that p# + 9 is divisible by the next prime after p. %C A302143 p# is the primorial as defined in A002110. %C A302143 a(5) > Prime[1.4*10^6] = 22182343. %Y A302143 Cf. A002110, A058233, A300898, A300899, A300900. %K A302143 nonn,more,hard %O A302143 1,1 %A A302143 _Robert Price_, Apr 02 2018