%I #5 Mar 30 2012 18:57:04
%S 1,2,3,5,4,7,6,9,11,8,13,15,10,17,12,19,21,14,23,16,25,27,18,29,31,20,
%T 33,22,35,37,24,39,41,26,43,28,45,47,30,49,32,51,53,34,55,57,36,59,38,
%U 61,63,40,65,42,67,69,44,71,73,46,75,48,77,79,50,81,83,52,85,54,87,89
%N Inverse permutation to A072061.
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%Y Cf. A072061.
%K nonn
%O 1,2
%A _Clark Kimberling_, Jun 12 2002
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