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%I #2 Mar 30 2012 18:57:10
%S 3,6,7,9,12,14,15,18,20,22,23,26,27,30,31,34,36,38,40,42,43,45,48,50,
%T 52,54,55,58,60,62,64,66,67,70,71,74,76,78,80,82,84,86,87,89,91,93,96,
%U 98,100,102,104,106,107,110,112,114,116,118,120,122,124,126,128,131,132
%N Positions of negative integers in A131389, minus 1.
%C If A131389 is a permutation of the integers, as conjectured, then A131392 is the complement of A131391.
%F a(n) = -1 + position of the n-th negative integer in the sequence A131389=(0,1,2,-1,3,4,-2,-3,6,-4,5,...)
%e The 5th negative integer to occur in A131391 is -5, which occurs in position 13, so that a(5)=13-1=12.
%Y Cf. A131388, A131389, A131390, A131391, A131393, A131394, A131395, A131396, A131397.
%K nonn
%O 1,1
%A _Clark Kimberling_, Jul 06 2007