203138

Appears in sequences

• Number of diagonal rectangles with corners on an n X n grid of points.at n=28A113751
• a(n) = 144*n^2 - 127*n + 28.at n=37A156719
• Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7.at n=18A251888
• Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 2 3 6 or 7.at n=18A252258