A194132 Number of ways to arrange 4 indistinguishable points on an n X n X n triangular grid so that no three points are collinear at any angle.

0, 0, 6, 114, 843, 4122, 14988, 45414, 119340, 281442, 608616, 1228812, 2338779, 4240284, 7371414, 12354156, 20052846, 31653108, 48726846, 73358964, 108233781, 156793974, 223400004, 313529940, 433929258, 592922880, 800651538, 1069378740

Offset: 1

Author

R. H. Hardin, Aug 17 2011

Keywords

• nonn

Comments

Column 4 of A194136.

Examples

			All solutions for 3 X 3 X 3:
....1......1......0......0......1......0
...0.1....1.1....1.1....1.1....1.0....1.1
..1.1.0..0.1.0..1.1.0..1.0.1..0.1.1..0.1.1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..78