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A300466 Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 8, 160, 8608, 1231578, 462538206, 456303004550, 1184061531948168, 8081950028633306006, 145086737722751262521230, 6849888315993282295524030922 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300472.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300472.

Sequence in context: A221077 A052140 A219265 * A184605 A195607 A064755

Adjacent sequences:  A300463 A300464 A300465 * A300467 A300468 A300469

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 06 2018

STATUS

approved

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Last modified August 16 07:50 EDT 2022. Contains 356160 sequences. (Running on oeis4.)