4027960domain: NAppears in sequencesNumber of nX3 arrays containing 3 copies of 0..n-1 with no element plus any diagonal or antidiagonal neighbor equal to n-1.at n=4A266182T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no element plus any diagonal or antidiagonal neighbor equal to n-1.at n=25A266183