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 A176568 #3 Mar 30 2012 18:52:40 %S A176568 0,117,121,207,245,289,297,325,343,363,405,425,475,483,495,513,529, %T A176568 531,625,627,637,665,705,715,747,765,777,783,801,805,833,845,847,867, %U A176568 873,891,897,903,915,925,957,961,963,987,1001,1005,1025,1045,1075,1083,1113,1143,1175,1197,1209,1245,1265 %N A176568 Nonnegative nonprimes which are neither the difference, nor the sum, nor the product of two distinct primes. %F A176568 A171469 INTERSECT A007921. [R. J. Mathar, May 02 2010] %Y A176568 Cf. A001477, A109934, A164376, A171469. %K A176568 nonn %O A176568 1,2 %A A176568 _Juri-Stepan Gerasimov_, Apr 20 2010 %E A176568 Corrected definition and values (inserted 289, 343 ...) - _R. J. Mathar_, May 02 2010