%I
%S 2,6,8586,16120,29886160
%N Numbers n such that n = sigma(n)  sigma(n1).
%C Also, numbers n such that antisigma(n) = antisigma(n1), where antisigma(n) = A024816(n) = the sum of the nondivisors of n that are between 1 and n.
%C Numbers n such that A163553(n1) = 0.
%F a(n) = A067816(n) + 1.
%e 6 is in sequence because antisigma(6) = antisigma(5) = 9.
%Y Cf. A067816, A024816 (antisigma(n)), A231546 (numbers n such that sigma(n) = sigma(n1)).
%K nonn
%O 1,1
%A _Jaroslav Krizek_, Nov 11 2013
