552721
domain: N
Appears in sequences
- Carmichael numbers: composite numbers k such that a^(k-1) == 1 (mod k) for every a coprime to k.at n=34A002997
- Carmichael numbers with exactly 4 prime factors.at n=11A074379
- Pseudoprimes to bases 2 and 7.at n=29A083733
- Pseudoprimes to bases 2,5 and 7.at n=16A083736
- Pseudoprimes to bases 2, 3 and 5.at n=27A083737
- Pseudoprimes to bases 2,3 and 7.at n=24A083738
- Pseudoprimes to bases 2, 3, 5 and 7.at n=15A083739
- Pseudoprimes to bases 3,5 and 7.at n=17A083740
- Pseudoprimes (base-2) equal to product of 4 primes not necessarily distinct.at n=30A112441
- Carmichael numbers with more than 3 prime factors.at n=11A141711
- Intersection of A001567 and A212502.at n=20A212601
- Carmichael numbers (A002997) that are not absolute Euler pseudoprimes (A033181).at n=22A262043
- Composite numbers n such that gcd(phi(n), n-1) = lambda(n), where lambda(n) = A002322(n).at n=18A264012
- Carmichael numbers (A002997) that are the sum of two squares.at n=14A265237
- Composite numbers k such that p^(k-1) == 1 (mod k) for every prime p strongly prime to k.at n=36A323214
- Carmichael numbers k for which A053575(k) [the odd part of phi] does not divide k-1.at n=23A340092
- Carmichael numbers ending in 1.at n=21A354609
- Carmichael numbers ordered by largest prime factor, then by size.at n=12A376485