21595159873domain: NAppears in sequencesCarmichael numbers of the form C = p*(2p-1)*(3p-2)*(6p-5), where p is prime.at n=3A182518Carmichael numbers of the form n*(2*n - 1)*(p*n - p + 1)*(2*p*n - 2*p + 1), where p is odd, p from 3 to 23.at n=9A212882