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A055033 usigma(usigma(n)), where usigma(n) is the sum of unitary divisors of n (A034448). 2

%I

%S 1,4,5,6,12,20,9,10,18,30,20,30,24,36,36,18,30,72,30,72,33,50,36,50,

%T 42,96,40,54,72,90,33,48,68,84,68,78,60,120,72,84,96,132,60,120,120,

%U 90,68,90,78,168,90,144,84,160,90,90,102,180,120,216,96

%N usigma(usigma(n)), where usigma(n) is the sum of unitary divisors of n (A034448).

%H Nathaniel Johnston, <a href="/A055033/b055033.txt">Table of n, a(n) for n = 1..10000</a>

%Y Cf. A034448, A051027, A061765, A064012.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Oct 30 2001

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Last modified April 8 05:55 EDT 2020. Contains 333312 sequences. (Running on oeis4.)