79804domain: NAppears in sequencesLeast m such that both p|m and p+2|m+2 for twin prime pairs (p,p+2) (p=A001359).at n=18A097972Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 222", based on the 5-celled von Neumann neighborhood.at n=8A270939