A302074 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

64, 8192, 190528, 6048836, 180330117, 5420105343, 163660519064, 4926680696151, 148486135409554, 4473321647227168, 134766772583347037, 4060050293871714740, 122318436951115950082, 3685280972257096460292, 111034886878989197205405

Offset

1,1

Comments

Row 7 of A302069.

Links

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

Example

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

Crossrefs

Cf. A302069.

Sequence in context: A301847 A302970 A291832 * A302813 A303474 A305522

Adjacent sequences: A302071 A302072 A302073 * A302075 A302076 A302077

Keyword

nonn

Author

R. H. Hardin, Mar 31 2018

Status

approved