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 A060399 #3 Mar 30 2012 16:49:04 %S A060399 11,23,31,41,53,61,67,83,89,101,103,127,131,149,151,163,167,181,191, %T A060399 307,311,421,431,433,457,461,467,487,491,503,521,523,563,641,653,659, %U A060399 673,683,691,701,719,727,733,743,751,761,769,787,797,809,811,821,823 %N A060399 In base ten, we try to get the digits 1,2,3,...,9,0,1,2,3,... in order only using a sequence of increasing primes and each time choosing the smallest prime that will give the desired digit. %Y A060399 Cf. A060915, A060916, A060399, A060400. %K A060399 base,easy,nonn %O A060399 1,1 %A A060399 _N. J. A. Sloane_, Apr 04 2001 %E A060399 More terms from Larry Reeves (larryr(AT)acm.org), Apr 09 2001