213200

Appears in sequences

• 4-dimensional pyramidal numbers: a(n) = n^2*(n^2-1)/12.at n=40A002415
• a(n) = n^2 * (4*n^2 - 1) / 3.at n=20A187756
• Number of integer-sided hexagons having perimeter n, modulo rotations but not reflections.at n=42A293823