A267748 Number of n X 3 arrays containing 3 copies of 0..n-1 with every element equal to or 1 greater than any north neighbor modulo n and the upper left element equal to 0.

1, 10, 39, 118, 313, 780, 1789, 4024, 8793, 18760, 39577, 82662, 170677, 350758, 717189, 1458604, 2959003, 5987586

Offset: 1

Author

R. H. Hardin, Jan 20 2016

Keywords

• nonn
• more

Examples

			Some solutions for n=4:
..0..0..2....0..3..2....0..1..1....0..3..3....0..2..2....0..1..3....0..2..0
..1..1..3....0..3..2....1..2..2....1..0..0....1..3..2....1..2..3....1..3..1
..2..1..3....1..0..2....2..3..3....2..1..1....1..3..3....2..3..0....2..3..1
..3..2..0....1..1..3....3..0..0....3..2..2....1..0..0....2..0..1....3..0..2
		

Crossrefs

Column 3 of A267751.