2000436751domain: NAppears in sequencesCarmichael numbers congruent to 3 modulo 4.at n=17A185321Carmichael numbers that are not of the form x^2 + y^2 + z^2 where x, y and z are integers.at n=11A267462Numbers k such that (k-1) mod phi(k) = lambda(k), where phi = A000010 and lambda = A002322.at n=6A290281