149442domain: NAppears in sequencesNumber of sets of 4 distinct collinear points in an n X n permutation array in which leftmost pair has same spacing as rightmost pair.at n=29A234471Number of nX5 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=8A297956