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In mathematics, a weird number is a natural number that is abundant but not semiperfect. The first
few weird numbers are 70, 836, 4030, 5830, 7192, 7912, 9272, 10430, ...
(sequence A006037 in OEIS). It has been shown that an infinite number of weird numbers exist, and the sequence of weird
numbers has also been proven to have positive Schnirelmann
density.
As of this writing, no odd weird number has been found.
See also
External links
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