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 A060120 #6 May 01 2014 02:46:42 %S A060120 0,1,2,4,5,3,6,7,12,18,19,13,14,20,8,10,16,22,21,15,23,17,11,9,24,25, %T A060120 26,28,29,27,48,49,72,96,97,73,74,98,50,52,76,100,99,75,101,77,53,51, %U A060120 54,55,78,102,103,79,30,31,36,42,43,37,60,66,84,108,114,90,67,61,91 %N A060120 Positions of permutations of A060118 in the canonical permutation list A055089. %H A060120 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A060120 a(n) = PermRevLexRank(PermUnrank3L(n)) %Y A060120 PermRevLexRank given in A056019. A060120[n] = A056019[A060119[n]] for all n. %Y A060120 Inverse permutation: A060127. %K A060120 nonn %O A060120 0,3 %A A060120 _Antti Karttunen_, Mar 02 2001