9773184domain: NAppears in sequencesNumber of n X 2 arrays of occupancy after each element moves to some king-move neighbor, with every occupancy equal to zero or two.at n=13A221270Number of (n+2)X(4+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 4.at n=7A252061