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 A214261 #8 Jul 09 2012 13:12:52 %S A214261 2,1,2,3,1,3,1,2,2,1,4,3,2,3,4,1,2,4,1,3,3,1,4,2,3,4,1,2,3,4,2,1,4,1, %T A214261 2,3,4,3,1,2,4,3,2,1,2,1,4,5,3,2,1,5,3,4,2,3,1,5,4,2,3,4,5,1,2,3,5,1, %U A214261 4,2,4,1,5,3,2,4,5,1,3,2,4,5,3,1,2,5,1 %N A214261 List of derangements of 1, 2, 3, ..., n for n = 2, 3, 4, ..., in lexicographic order. %e A214261 The derangements can be written as %e A214261 21, %e A214261 231, 312, %e A214261 2143, 2341, 2413, 3142, 3412, 3421, 4123, 4312, 4321, etc. %Y A214261 Cf. A000166, A030298, A065087 (row sums), A086325 (row lengths). %K A214261 nonn,tabf %O A214261 2,1 %A A214261 _William Rex Marshall_, Jul 08 2012