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 A082357 #5 Mar 31 2012 14:02:19 %S A082357 0,1,3,2,7,6,8,5,4,17,16,18,15,14,22,21,20,12,11,19,13,10,9,45,44,46, %T A082357 43,42,50,49,48,40,39,47,41,38,37,63,62,64,59,58,61,57,54,31,30,53,32, %U A082357 29,28,60,56,55,36,35,52,34,26,25,51,33,27,24,23,129,128,130,127,126 %N A082357 Permutation of natural numbers: composition of permutations A082355 & A057163. %H A082357 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a> %F A082357 a(n) = A082355(A057163(n)) %Y A082357 Inverse of A082358. Cf. also A082359-A082360. %K A082357 nonn %O A082357 0,3 %A A082357 _Antti Karttunen_, Apr 17 2003