A267406 Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any north, west or northwest neighbors modulo 5 and the upper left element equal to 0.

1, 1, 1, 1, 2, 7, 71, 795, 7664, 61168, 418261, 2525791, 13827686, 70162052, 338544546, 1605713949, 7857197985, 41880484406, 250463596645, 1646316263522, 11316228123469

Offset

1,5

Comments

Row 5 of A267401.

Links

Table of n, a(n) for n=1..21.

Example

Some solutions for n=8
..0..0..1..1..2..2..3..4....0..0..1..1..2..3..3..3....0..1..2..2..3..4..4..0
..0..0..1..2..2..3..3..4....0..0..1..2..2..3..4..4....0..1..2..3..3..4..4..0
..0..1..1..2..3..3..3..4....0..0..1..2..2..3..4..4....1..1..2..3..3..4..0..0
..0..1..1..2..3..4..4..4....0..1..1..2..2..3..4..4....1..1..2..3..3..4..0..1
..0..1..2..2..3..4..4..0....0..1..1..2..3..3..4..4....2..2..2..3..4..4..0..1

Crossrefs

Cf. A267401.

Sequence in context: A188665 A198188 A230459 * A376056 A100360 A061421

Adjacent sequences: A267403 A267404 A267405 * A267407 A267408 A267409

Keyword

nonn

Author

R. H. Hardin, Jan 13 2016

Status

approved