190715003652domain: NAppears in sequencesNumber of (n+1)X(2+1) 0..3 arrays with the maximum plus the minimum of every 2X2 subblock equal.at n=6A237152Number of (n+1)X(7+1) 0..3 arrays with the maximum plus the minimum of every 2X2 subblock equal.at n=1A237157