O'Halloran numbers: Difference between revisions
Added link to the Idoneal numbers task
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;* [https://www.numbersaplenty.com/set/O_Halloran_number/ Numbers Aplenty - O'Halloran numbers]
;* [[oeis:A072843|OEIS:A072843 - O'Halloran numbers: even integers which cannot be the surface area of a cuboid with integer-length sides]]
;* [[Idoneal numbers]]
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