39065788domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..3 arrays with the maximum plus the minimum of every 2X2 subblock equal.at n=2A237153T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the maximum plus the minimum of every 2 X 2 subblock equal.at n=12A237158