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 A096782 #6 Mar 30 2012 18:50:44 %S A096782 1,2,3,4,56,11,57,22,5,8,28,7,3082,254,79,6,9317,9,907,12,17,174,8003, %T A096782 137,23,33,667,14,677,13 %N A096782 A096780(A096780(n)). %C A096782 Integer permutation with inverse A096781: a(A096781(n))=A096781(a(n))=n; %C A096782 A075383(a(n))=a(A075383(n))=A096780(n). %H A096782 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %K A096782 nonn %O A096782 1,2 %A A096782 _Reinhard Zumkeller_, Jul 09 2004