A318220 Number of nX6 0..1 arrays with every element unequal to 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 16, 413, 13722, 407121, 12458503, 381426500, 11669008142, 357007586982, 10922535527287, 334171256230583, 10223857024851046, 312795489864911224, 9569873151878592164, 292787060908281364545, 8957721988741466827281

Offset

1,2

Comments

Column 6 of A318222.

Links

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

Example

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

Crossrefs

Cf. A318222.

Sequence in context: A172205 A209362 A338800 * A035275 A173947 A264169

Adjacent sequences: A318217 A318218 A318219 * A318221 A318222 A318223

Keyword

nonn

Author

R. H. Hardin, Aug 21 2018

Status

approved