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 A082320 #5 Mar 31 2012 14:02:19
%S A082320 0,1,2,3,4,6,8,7,5,9,14,21,18,13,10,15,20,17,12,19,16,11,22,23,37,58,
%T A082320 49,35,24,38,57,48,34,56,47,33,64,25,39,59,50,36,26,40,54,45,31,53,44,
%U A082320 30,63,27,41,55,46,32,51,42,28,62,52,43,29,61,60,65,107,170,142,100
%N A082320 Permutation A057502 applied four times ("^4"), permutation A082316 squared.
%H A082320 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a>
%F A082320 a(n) = A082316(A082316(n))
%Y A082320 Inverse of A082319. Occurs in A073200. Cf. also A082321-A082324.
%K A082320 nonn
%O A082320 0,3
%A A082320 _Antti Karttunen_, Apr 17 2003