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%I #6 Mar 30 2012 18:50:19
%S 1,3,2,5,4,7,6,8,10,9,12,11,16,13,18,14,22,15,28,17,30,19,36,20,40,21,
%T 42,23,46,24,52,25,58,26,60,27,66,29,70,31,72,32,78,33,82,34,88,35,96,
%U 37,100,38,102,39,106,41,108,43,112,44,126,45,130,47,136,48,138,49,148
%N Inverse permutation to A066250.
%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 odd then A000040((n+1)/2) else A002808(n/2)) - 1.
%Y Cf. A066250, A000040, A002808, A066248, A066255.
%K nonn
%O 1,2
%A _Reinhard Zumkeller_, Dec 09 2001