278516domain: NAppears in sequencesNumber of n X n arrays of squares of integers with every 3X3 subblock summing to 7.at n=4A159207Number of 5Xn 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=9A303200