18162001

Appears in sequences

• Carmichael numbers equal to the product of 5 primes.at n=7A112428
• Carmichael numbers divisible by 11.at n=17A182090
• Carmichael numbers divisible by 31.at n=22A182151
• Carmichael numbers divisible by a smaller Carmichael number.at n=13A214758
• Carmichael numbers k such that Euler totient function of k (phi(k)) is a cube.at n=1A290793
• Carmichael numbers k such that (k-1)/lambda(k) > (m-1)/lambda(m) for all Carmichael numbers m < k, where lambda is the Carmichael lambda function (A002322).at n=13A367320