Poulet numbers (Fermat pseudoprimes to base 2) k that have an abundancy index sigma(k)/k that is larger than the abundancy index of all smaller Poulet numbers.
A328691
Poulet numbers (Fermat pseudoprimes to base 2) k that have an abundancy index sigma(k)/k that is larger than the abundancy index of all smaller Poulet numbers.
Terms
- a(0) =341a(1) =561a(2) =645a(3) =18705a(4) =2113665a(5) =2882265a(6) =81722145a(7) =9234602385
External references
- oeis: A328691