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 A163892 #2 Mar 31 2012 13:21:18 %S A163892 1,2,6,3,4,8,12,18,9,16,32,24,108,36,48,54,72,64,96,192,216,324,144, %T A163892 162,288,576,648,384,1944,432,864,486,972,1296,27,768,1152,128,5832, %U A163892 1728,1536,3456,2304 %N A163892 Distinct values in A163890 in the order of appearance. %C A163892 Probably a permutation of A003586 (A036561). %Y A163892 a(n) = A163890(A163891(n)). See also A163891, A163893, A163894, A163912. %K A163892 nonn %O A163892 0,2 %A A163892 _Antti Karttunen_, Sep 19 2009