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 A165245 #3 Mar 31 2012 10:26:15
%S A165245 2375,2537,2573,2735,3275,3572,3725,3752,5327,5372,5723,5732,7235,
%T A165245 7325,7352,7532
%N A165245 Nonprimes with all digits distinct, all digits prime, and a nonprime number of digits.
%C A165245 Or: the 4-digit nonprimes with a digit-set of {2,3,5,7}. - R. J. Mathar, Sep 16 2009
%Y A165245 Cf. A141521
%K A165245 nonn,base,fini,full,less
%O A165245 1,1
%A A165245 _Lekraj Beedassy_, Sep 09 2009
%E A165245 Keyword:less,base added by _R. J. Mathar_, Sep 16 2009