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 A077504 #6 Dec 05 2013 19:55:53 %S A077504 23,307,4001,50021,600011,7000003,80000023,900000011,1000000007, %T A077504 11000000021,120000000007,1300000000021,14000000000003, %U A077504 150000000000007,1600000000000007,17000000000000009,180000000000000029 %N A077504 Smallest n-digit prime beginning with n. %Y A077504 Cf. A077505, A088104, A088105, A088754, A088755. %K A077504 base,nonn %O A077504 2,1 %A A077504 _Amarnath Murthy_, Nov 08 2002 %E A077504 More terms from _Sascha Kurz_, Jan 04 2003