A301401 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 8, 252, 31012, 14905344, 27990353344, 205353183605152, 5886041167193603328, 659134453175183361984192, 288372301975051917749449831520, 492903495313227230995120900845724672

Offset

1,2

Comments

Diagonal of A301407.

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

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

Crossrefs

Cf. A301407.

Sequence in context: A138323 A214817 A303415 * A162132 A297051 A213412

Adjacent sequences: A301398 A301399 A301400 * A301402 A301403 A301404

Keyword

nonn

Author

R. H. Hardin, Mar 20 2018

Status

approved