402560143085domain: NAppears in sequencesHalf the number of (n+1)X5 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=7A184226Half the number of (n+1)X9 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=3A184230