287601819479domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal.at n=4A237941Number of (n+1)X(5+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal.at n=3A237942