288120421domain: NAppears in sequencesCarmichael numbers of the form (30k+7)*(60k+13)*(150k+31).at n=2A182085Carmichael numbers whose prime factors all have the form p=1+x^2+y^2 for some x,y in Z.at n=13A258839Carmichael numbers (A002997) that are not minimal in their family.at n=20A335584