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%I #9 Jan 28 2014 16:53:57
%S 0,1,2,11,4,47,6,57,36,109,10,245,12,195,170,247,16,509,18,547,292,
%T 439,22,1055,152,597,358,969,28,1895,30,1013,632,985,534,2431,36,1215,
%U 850,2317,40,3397,42,2173,1712,1747,46,4313,396,2953,1382,2955,52,4715,1090,4083
%N Sum of proper divisors minus the number of proper divisors of the square A000290(n).
%H B. D. Swan, <a href="/A152985/b152985.txt">Table of n, a(n) for n=1,...,50000</a>
%F a(n) = A001065(A000290(n)) - A032741(A000290(n)) = A152770(A000290(n)).
%o (PARI) a(n) = sigma(n^2) - n^2 - (numdiv(n^2) - 1); \\ _Michel Marcus_, Jan 28 2014
%Y Cf. A000005, A000203, A000290, A001065, A032741, A152770.
%K nonn,look
%O 1,3
%A _Omar E. Pol_, Dec 21 2008
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