2628073
domain: N
Appears in sequences
- a(n) is the smallest Carmichael number (A002997) divisible by the n-th prime, or 0 if no such number exists.at n=32A135721
- Carmichael numbers of the form C = 37*73*(18n+91).at n=4A182206
- Carmichael numbers of the form C = p*(2p-1)*(n*(2p-2)+p), where p and 2p-1 are prime numbers.at n=23A182207
- Carmichael numbers divisible by 7.at n=20A182208
- Carmichael numbers (A002997) k such that k-1 is a perfect power (A001597).at n=3A265328
- Carmichael numbers (A002997) of the form k^3 + 1.at n=2A265628
- Sum of two (possibly negative) coprime cubes in at least 3 ways, but not the sum of 2 noncoprime cubes.at n=9A293651
- The phi-radical numbers: composite numbers m such that rad(phi(m)) = rad(m-1).at n=28A306478
- Carmichael numbers m such that A309132(m) < m.at n=10A309268
- Carmichael numbers ending in 3.at n=6A355309
- Carmichael numbers that are the sum of 2 positive cubes.at n=7A379656