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%I #6 Mar 30 2012 18:50:37
%S 2,1,3,6,10,4,14,8,12,5,22,9,26,7,15,20,34,30,38,16,21,11,46,24,25,13,
%T 45,42,58,18,62,40,33,17,245,36,74,19,39,32,82,28,86,66,27,23,94,48,
%U 98,60,51,78,106,54,110,56,57,29,118,50,122,31,147,80,130,44,134
%N a(A086957(n))=A086958(n), a(A086958(n))=A086957(n), a(A086959(n))=A086959(n), see A086956.
%C A self-inverse permutation of natural numbers: a(a(n))=n;
%C a(n) = A086962(A086963(n)) = A086963(A086962(n)).
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%Y Cf. A086572, A086571.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Jul 25 2003