3225601
domain: N
Appears in sequences
- Numbers that are both Poulet and Proth.at n=7A242880
- Composite integers n such that n-1 divided by the binary period of 1/n (=A007733(n)) equals an integral power of 2.at n=2A243050
- a(n) is the smallest k > 1 such that A000166(k) is divisible by n!.at n=12A293246
- The phi-radical numbers: composite numbers m such that rad(phi(m)) = rad(m-1).at n=30A306478