Definition:Primitive Semiperfect Number/Sequence

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Definition

The sequence of primitive semiperfect numbers begins:

$6, 20, 28, 88, 104, 272, 304, 350, 368, 464, 490, 496, 550, 572, \ldots$

This sequence is A006036 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).


Sources