183988612894domain: NAppears in sequences1/4 the number of (n+1) X 5 0..3 arrays with every 2 X 2 subblock having distinct clockwise edge differences.at n=4A2097121/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences.at n=3A209713