16003252128domain: NAppears in sequencesT(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock having the sum of its 72 absolute element differences equal to 46.at n=17A234858T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock having the sum of its 72 absolute element differences equal to 46.at n=18A234858