216680

Appears in sequences

• Number of 12 X 12 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.at n=3A156411
• Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 3.at n=9A156433
• Number of ways to place 3 nonattacking knights on a 3 X n board.at n=37A172212
• Number of (n+1) X (2+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=9A235011