A301847 Number of 7Xn 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

64, 8192, 132971, 3518619, 77396422, 1812097252, 41966406867, 972282892539, 22595595313115, 524762543383531, 12194289128927894, 283431884166143510, 6588576515306179215, 153173958754721101279, 3561231247509661888958

Offset

1,1

Comments

Row 7 of A301841.

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..1..0. .0..0..1..1..0
..0..0..1..1..0. .0..0..1..1..0. .0..0..1..0..0. .0..0..0..0..1
..0..0..0..1..1. .0..0..0..1..0. .1..0..1..1..1. .1..1..1..0..0
..1..1..0..0..0. .1..0..1..0..1. .0..0..0..0..1. .0..0..1..1..0
..1..0..1..1..0. .0..1..1..1..0. .1..1..0..0..1. .0..0..1..1..1

Crossrefs

Cf. A301841.

Sequence in context: A264016 A160448 A302271 * A302970 A291832 A302074

Adjacent sequences: A301844 A301845 A301846 * A301848 A301849 A301850

Keyword

nonn

Author

R. H. Hardin, Mar 27 2018

Status

approved