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 A109075 #5 Mar 30 2012 17:26:17 %S A109075 0,0,0,0,16,0,0,2668,0,0 %N A109075 Number of primes which use each of 0-to-n decimal digits exactly once. %C A109075 There are exactly 16 five-digit primes using decimal digits 0-to-4 exactly once: A109176 and 2668 eight-digit primes using each of 0-to-7 decimal digits exactly once: A109177, A109178. Cf. A094258. %Y A109075 Cf. A094258, A109176, A109177, A109178. %K A109075 base,full,nonn,fini %O A109075 0,5 %A A109075 _Zak Seidov_, Jun 21 2005