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

1,2

Links

Table of n, a(n) for n=1..18.

Example

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.

Sequence in context: A348617 A188480 A059722 * A229325 A074225 A055514

Adjacent sequences: A267745 A267746 A267747 * A267749 A267750 A267751

Keyword

nonn,more

Author

R. H. Hardin, Jan 20 2016

Status

approved