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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
1, 8, 252, 31012, 14905344, 27990353344, 205353183605152, 5886041167193603328, 659134453175183361984192, 288372301975051917749449831520, 492903495313227230995120900845724672 (list; graph; refs; listen; history; text; internal format)
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

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Last modified August 4 10:11 EDT 2021. Contains 346447 sequences. (Running on oeis4.)