A302321 Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 960, 4509, 55727, 529381, 4521584, 45861206, 444688101, 4176914829, 40809262060, 395654711075, 3811906778065, 37003644433919, 358647770159776, 3475163995822613, 33712933618938830, 326851938344178738

Offset

1,1

Comments

Column 7 of A302322.

Links

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

Example

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

Crossrefs

Cf. A302322.

Sequence in context: A265620 A358861 A253133 * A303015 A302819 A303512

Adjacent sequences: A302318 A302319 A302320 * A302322 A302323 A302324

Keyword

nonn

Author

R. H. Hardin, Apr 05 2018

Status

approved