962442001domain: NAppears in sequencesa(n) is the largest Carmichael number of the form prime(n)*prime(n')*prime(n") with n < n' < n", or 0 if no such number exists.at n=20A141706The largest 3-Carmichael number that is divisible by the n-th odd prime.at n=19A290485Triangular Carmichael numbers.at n=21A290945