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%I #9 Dec 29 2020 10:50:17
%S 1,0,2,3,4,5,0,7,8,9,0,11,0,13,0,0,16,17,0,19,0,0,0,23,0,25,0,27,0,29,
%T 0,31,32,0,0,24,0,37,0,28,0,41,0,43,0,0,0,47,0,49,0,0,0,53,0,39,0,0,0,
%U 59,0,61,0,0,64,0,0,67,0,52,0,71,0,73,0,0,0,50,0,79,0,81,0,83,0,0,0,0
%N a(n) is the largest m such that usigma(m) = n (or 0 if no such m).
%C usigma(m) is the sum of unitary divisors of m, A034448.
%H Daniel Suteu, <a href="/A063973/b063973.txt">Table of n, a(n) for n = 1..10000</a>
%e a(12)=11 because the unitary divisors of 11 are 1,11; they sum to 12.
%Y Cf. A034444, A034448, A051444, A057637, A063972.
%K nonn
%O 1,3
%A _Labos Elemer_, Sep 05 2001
%E Corrected by _Don Reble_, May 14 2006
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