An aliquot sequence computed using the analog of the restricted divisor function 
in which only unitary divisors are included.
Unitary Aliquot Sequence
See also
Aliquot Sequence, Unitary Amicable Pair, Unitary Divisor Function, Unitary Sociable NumbersExplore with Wolfram|Alpha
References
Guy, R. K. "Unitary Aliquot Sequences." §B8 in Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, pp. 63-65, 1994.Referenced on Wolfram|Alpha
Unitary Aliquot SequenceCite this as:
Weisstein, Eric W. "Unitary Aliquot Sequence." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/UnitaryAliquotSequence.html