OFFSET
1,1
COMMENTS
These are called Cauchy numbers in Cameron et al., where they are proved to be the following set: 6 U prime powers U numbers of the form 2*p^a where p is a Fermat prime greater than 3.
LINKS
Peter J. Cameron, David Craven, Hamid Reza Dorbidi, Scott Harper, and Benjamin Sambale, Minimal Cover Groups, arXiv:2311.15652 [math.GR], 2023-2024.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Tom Harris, Mar 08 2024
STATUS
approved