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%I #6 Mar 30 2012 18:50:19
%S 3,1,5,2,7,4,8,6,9,10,11,12,13,16,14,18,15,22,17,28,19,30,20,36,21,40,
%T 23,42,24,46,25,52,26,58,27,60,29,66,31,70,32,72,33,78,34,82,35,88,37,
%U 96,38,100,39,102,41,106,43,108,44,112,45,126,47,130,48,136,49,138,50
%N Inverse permutation to A066248.
%C Permutation of natural numbers.
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%F a(n) = (if n is even then A000040(n/2) else A002808((n+1)/2)) - 1.
%Y Cf. A066248, A000040, A002808, A066251, A066253.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Dec 09 2001
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