283801domain: NAppears in sequencesNumbers m such that 4^(m-1) == 1 (mod (m-1)^2 + 1).at n=12A273870Number of n X 3 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.at n=25A304136