131072000domain: NAppears in sequencesBinomial transform of A005563.at n=20A176027Number of (n+1) X (n+1) 0..2 arrays with every 2 X 2 subblock diagonal maximum minus antidiagonal minimum unequal to its neighbors horizontally, vertically, diagonally and antidiagonally.at n=18A253461a(n) = A257851(n,n).at n=21A264959