A267754 Number of 6Xn arrays containing n copies of 0..6-1 with every element equal to or 1 greater than any north neighbor modulo 6 and the upper left element equal to 0.

1, 15, 780, 68151, 7280046, 873319806, 113187903900, 15506951007015, 2214490608127986, 326564039118851370

Offset

1,2

Comments

Row 6 of A267751.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=4
..0..2..3..5....0..2..1..5....0..4..2..0....0..5..2..3....0..2..5..1
..0..2..3..5....1..3..2..5....1..5..2..0....1..0..2..4....0..3..5..2
..0..2..4..0....2..4..3..0....2..5..3..1....2..0..3..4....1..3..5..2
..1..3..4..1....2..4..4..0....3..5..4..1....2..1..4..4....2..4..0..3
..2..4..5..1....3..4..5..1....3..0..4..2....3..1..5..5....3..5..1..4
..3..4..5..1....3..5..0..1....4..1..5..3....3..1..5..0....4..0..1..4

Crossrefs

Cf. A267751.

Sequence in context: A177598 A333562 A116094 * A317798 A280310 A211104

Adjacent sequences: A267751 A267752 A267753 * A267755 A267756 A267757

Keyword

nonn

Author

R. H. Hardin, Jan 20 2016

Status

approved