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 A101547 #12 Feb 08 2016 09:13:11 %S A101547 1,2,3,4,5,8,10,11,7,13,9,16,6,19,20,22,23,14,26,15,29,31,17,34,18,37, %T A101547 38,40,12,41,44,46,25,47,49,27,52,55,28,56,30,59,32,62,33,65,67,36,35, %U A101547 70,73,74,21,76,77,80,82,43,83,85,45,88,24,91,92,94,95,98,50,51,101,103 %N A101547 a(n) = A101545(A101545(n)). %C A101547 Inverse permutation to A101546. %H A101547 Ivan Neretin, <a href="/A101547/b101547.txt">Table of n, a(n) for n = 1..10000</a> %H A101547 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A101547 Cf. A101545, A101546. %K A101547 nonn %O A101547 1,2 %A A101547 _Reinhard Zumkeller_, Dec 06 2004