1809600domain: NAppears in sequencesNumber of (6+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=26A253703Values of Euler's totient phi for A050498.at n=32A339883