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 A095260 #8 Dec 02 2021 17:27:13 %S A095260 1,2,3,4,9,8,32,11,18,6,25,26,99,34,235,5,15,17,68,94,27,49,241,243, %T A095260 24,10,102,28,19,10519,505,74,219,16,119,506,289,23,12,21,29,925,56, %U A095260 46,116,7,113,48,193,51,13,73,470,54,37,47,72,174,85,22,471,479,131 %N A095260 a(n) = A095258(A095258(n)). %C A095260 Integer permutation with inverse A095261: a(A095261(n)) = A095261(a(n)) = n; %C A095260 A095259(a(n)) = a(A095259(n)) = A095258(n). %H A095260 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A095260 Cf. A095258, A095259, A095261. %K A095260 nonn %O A095260 1,2 %A A095260 _Reinhard Zumkeller_, May 31 2004