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 A105468 #11 Mar 05 2019 10:29:28
%S A105468 0,30,392,3935,39400,393737,3933421,39339651
%N A105468 Number of irregular primes less than or equal to the 10^n-th prime.
%C A105468 Limit_{n->inf.} a(n)/10^n -> 1-e^(-1/2).
%t A105468 ip={ the list of irregular primes to 12 million }; Table[ Length[ Select[ip, # <= Prime[10^n] &]], {n, 5}]
%Y A105468 Cf. A000928, A006988, A105463.
%K A105468 hard,nonn,more
%O A105468 1,2
%A A105468 _Robert G. Wilson v_, Apr 07 2005
%E A105468 Data corrected and a(6)-a(8) added by _Amiram Eldar_, Mar 05 2019