A298628 Number of n X 7 0..1 arrays with every element equal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

0, 104, 2880, 71334, 4228781, 193309200, 9557110072, 471778534219, 23254989974319, 1151387446628951, 56934303336591137, 2817505489516999198, 139419988171524739756, 6899299591626979177626, 341425278258241925272274

Offset

1,2

Comments

Column 7 of A298629.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..0..0..1..0..0..0..0. .0..0..0..0..1..1..1. .0..1..1..0..1..1..1
..0..1..1..0..1..1..0. .0..1..1..0..1..1..0. .0..0..1..0..0..1..1
..0..0..1..0..1..1..1. .0..0..1..0..0..0..0. .0..1..1..1..1..1..1
..0..0..0..0..1..1..1. .0..0..0..0..1..0..1. .0..0..1..1..0..1..0
..0..0..0..0..0..1..1. .0..0..0..0..1..1..1. .0..0..0..0..1..0..0

Crossrefs

Cf. A298629.

Sequence in context: A092714 A297977 A298840 * A281536 A250684 A299601

Adjacent sequences: A298625 A298626 A298627 * A298629 A298630 A298631

Keyword

nonn

Author

R. H. Hardin, Jan 23 2018

Status

approved