A303020 Number of 6Xn 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

32, 857, 5220, 24030, 160253, 1298140, 9976891, 75234550, 587492276, 4655638153, 36937598678, 293971295920, 2351936160662, 18881820084138, 151907805236940, 1224351999451973, 9884044359813506, 79891695476240047, 646370835714526370

Offset

1,1

Comments

Row 6 of A303016.

Links

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

Example

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

Crossrefs

Cf. A303016.

Sequence in context: A302419 A303186 A302327 * A302824 A303517 A240482

Adjacent sequences: A303017 A303018 A303019 * A303021 A303022 A303023

Keyword

nonn

Author

R. H. Hardin, Apr 17 2018

Status

approved