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 A086960 #6 Mar 30 2012 18:50:37 %S A086960 2,3,1,6,10,8,14,4,12,25,22,15,26,21,9,20,34,30,38,24,7,33,46,16,5,39, %T A086960 45,42,58,36,62,40,11,51,245,18,74,57,13,48,82,56,86,66,54,69,94,32, %U A086960 98,60,17,78,106,27,110,28,19,87,118,70,122,93,147,80,130,88,134 %N A086960 a(A086957(n))=A086958(n), a(A086958(n))=A086959(n), a(A086959(n))=A086957(n), see A086956. %C A086960 permutation of natural numbers with inverse A086961: a(A086961(n)) = A086961(a(n)) = n; %C A086960 a(n) = A086962(A086963(n)) = A086963(A086962(n)). %H A086960 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A086960 Cf. A086572, A086571. %K A086960 nonn %O A086960 1,1 %A A086960 _Reinhard Zumkeller_, Jul 25 2003