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%I #6 Apr 30 2019 00:24:20
%S 0,1,3,4,2,5,11,7,6,11,16,17,8,11,29,4,13,10,23,35,26,12,17,10,47,19,
%T 14,43,47,35,28,23,67,6,38,18,41,59,14,57,20,29,97,31,36,57,16,71,53,
%U 24,67,112,37,44,59,16,83,97,36,41,129,20,43,30
%N Sum of proper divisors minus the number of proper divisors of nonprime number A018252(n).
%C Also, zero together with the positive integers of A152770.
%C Note that the k-th positive integer of this sequence is equal to the sum of proper divisors minus the number of proper divisors of the composite number A002808(k).
%F a(n) = A152770(A018252(n)).
%F a(n) = A001065(A018252(n)) - A032741(A018252(n)).
%p A162196 := proc(n)
%p A152770(A018252(n)) ;
%p end proc: # _R. J. Mathar_, Sep 28 2011
%Y Cf. A001065, A018252, A002808, A032741, A152770, A152988, A152989, A152990, A162194, A162195.
%K easy,nonn
%O 1,3
%A _Omar E. Pol_, Jul 04 2009
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