145380domain: NAppears in sequencesNumber of (n+2) X (5+2) 0..1 arrays with every 2 X 2 and 3 X 3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=15A253507Number of edges in a "frame" of size n X n (see Comments in A331776 for definition).at n=17A332597