A303474 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 8192, 240109, 8511918, 302023677, 10589284528, 373571747330, 13168795781782, 464090568326205, 16358580942971076, 576597835196073800, 20323581029125802804, 716356995061667848093, 25249828305783449920908

Offset

1,1

Comments

Row 7 of A303469.

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

Crossrefs

Cf. A303469.

Sequence in context: A291832 A302074 A302813 * A305522 A208714 A316959

Adjacent sequences: A303471 A303472 A303473 * A303475 A303476 A303477

Keyword

nonn

Author

R. H. Hardin, Apr 24 2018

Status

approved