51672

Appears in sequences

• Number of 9 X 9 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.at n=13A156401
• Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.at n=9A222610