A219148 Unchanging value maps: number of 7Xn binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 7Xn array

1, 1157, 25277, 472638, 9702349, 191707377, 3862325048, 78006637065, 1583568237267, 32151936434405

Offset

1,2

Comments

Row 7 of A219142

Links

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

Example

Some solutions for n=3
..1..1..1....1..0..0....0..0..1....1..0..0....1..1..1....0..0..0....0..0..1
..1..0..1....1..0..1....0..0..1....0..0..0....1..0..1....0..1..0....0..0..0
..1..0..0....0..0..1....0..0..1....0..0..1....0..0..0....1..1..1....1..0..0
..0..0..1....1..0..0....0..0..0....1..0..1....1..0..0....1..1..1....0..0..0
..1..0..0....1..0..0....1..0..0....0..0..0....1..0..1....0..0..0....1..0..0
..0..0..0....0..0..1....1..0..0....0..0..0....0..0..0....0..0..0....1..0..0
..1..0..0....0..0..1....1..0..0....0..0..0....1..0..0....0..0..0....0..0..1

Crossrefs

Sequence in context: A217279 A204478 A031746 * A031532 A168248 A237205

Adjacent sequences: A219145 A219146 A219147 * A219149 A219150 A219151

Keyword

nonn

Author

R. H. Hardin Nov 12 2012

Status

approved