217182

Appears in sequences

• Number of Barlow packings that repeat after exactly n layers.at n=25A011768
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.at n=9A150765
• Number of different closest packings of equal spheres for hexagonal crystals having repeat period n.at n=25A371991