A267657 Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any north or southwest neighbors modulo 5 and the upper left element equal to 0.

1, 3, 21, 221, 1811, 13359, 129319, 1586523, 18730678, 199349073, 2099779009, 24121529923, 295646288820, 3584583743925, 42093020236586, 495027849517287, 6012600565537213, 74749463188676255

Offset

1,2

Comments

Row 5 of A267655.

Links

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

Example

Some solutions for n=7
..0..1..2..3..4..1..2....0..0..2..3..3..4..1....0..0..2..3..4..0..1
..1..2..3..4..0..1..3....0..1..3..3..4..0..1....0..1..3..4..0..1..1
..1..3..4..0..1..2..4....0..2..3..4..4..1..2....1..2..3..4..0..1..2
..2..3..0..0..2..3..4....1..2..3..4..0..1..3....2..3..4..4..0..2..2
..3..4..0..1..2..4..0....2..2..4..0..1..2..4....3..3..4..4..1..2..3

Crossrefs

Cf. A267655.

Sequence in context: A218494 A099121 A107864 * A303057 A354263 A369795

Adjacent sequences: A267654 A267655 A267656 * A267658 A267659 A267660

Keyword

nonn

Author

R. H. Hardin, Jan 19 2016

Status

approved