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An Aliquot Sequence computed using the analog of the Restricted Divisor Function  in which only
Unitary Divisors are included.
 in which only
Unitary Divisors are included.
See also Aliquot Sequence, Unitary Sociable Numbers
References
Guy, R. K.  ``Unitary Aliquot Sequences.''  §B8 in 
  Unsolved Problems in Number Theory, 2nd ed.  New York: Springer-Verlag, pp. 63-65, 1994.