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 A069597 #5 Dec 05 2013 19:55:16 %S A069597 101,1009,10007,100003,1000003,10000019,100000007,1000000007, %T A069597 10000000019,100000000003,1000000000039,10000000000037, %U A069597 100000000000031,1000000000000037,10000000000000061,100000000000000003 %N A069597 Smallest prime in which the n-th significant digit is a 0. %p A069597 seq(nextprime(10^j),j=2..32); %Y A069597 Cf. A069588, A069589, A069590, A069591, A069592, A069593, A069594, A069595, A069596. %K A069597 base,nonn %O A069597 2,1 %A A069597 _Amarnath Murthy_, Mar 25 2002 %E A069597 More terms from _Sascha Kurz_, Mar 28 2002