175720

Appears in sequences

• Number of ways to place 8 nonattacking knights on an 8 X n board.at n=3A174698
• Number of (4+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=18A253701
• Array read by antidiagonals: T(n,k) is the number of ways to place k nonattacking knights on an n X k board.at n=58A390160