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 A039998 #4 Oct 14 2012 12:58:14 %S A039998 1,1,1,1,1,2,2,1,1,1,2,2,1,1,1,1,1,1,1,2,2,2,1,1,2,2,3,4,2,3,2,3,3,2, %T A039998 4,1,3,3,3,3,4,2,2,2,4,3,1,1,1,1,1,2,2,2,1,1,1,2,2,2,2,2,3,3,2,3,2,3, %U A039998 2,2,1,3,2,3,4,1,3,4,2,1,4,2,1,1,2,1,1,2,2,2,2,2,1,4,1,2,2,2,1,1,2,1,2,2,3 %N A039998 Primes embedded in prime(n). %C A039998 a(n) counts permutations of digits of prime(n) which denote primes. %F A039998 a(n) = A039999(prime(n)). %K A039998 nonn,base %O A039998 1,6 %A A039998 _David W. Wilson_