16965787428domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2.at n=5A251206Number of (n+1)X(6+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2.at n=3A251208