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 A069594 #7 Dec 05 2013 19:55:15 %S A069594 41,401,4001,40009,400009,4000037,40000003,400000009,4000000007, %T A069594 40000000003,400000000019,4000000000039,40000000000001, %U A069594 400000000000063,4000000000000021,40000000000000063,400000000000000013 %N A069594 Smallest prime in which the n-th significant digit is a 4. %p A069594 seq(nextprime(4*10^j),j=1..32); %t A069594 NextPrime[4*10^Range[20]] (* _Harvey P. Dale_, Apr 11 2013 *) %Y A069594 Cf. A069588, A069589, A069590, A069591, A069592, A069593. %K A069594 base,nonn %O A069594 2,1 %A A069594 _Amarnath Murthy_, Mar 25 2002 %E A069594 More terms from _Sascha Kurz_, Mar 28 2002