256052940domain: NAppears in sequencesNumber of nX3 arrays of permutations of 0..n*3-1 with each element moved a city block distance of 0 or 2.at n=6A263421T(n,k)=Number of nXk arrays of permutations of 0..n*k-1 with each element moved a city block distance of 0 or 2.at n=38A263424