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A302316 Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
1, 8, 65, 953, 20686, 708572, 45861206, 4252740185, 585620151599 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A302322.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A302322.

Sequence in context: A081190 A189431 A024105 * A041114 A320990 A015496

Adjacent sequences:  A302313 A302314 A302315 * A302317 A302318 A302319

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 05 2018

STATUS

approved

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Last modified January 16 19:48 EST 2022. Contains 350376 sequences. (Running on oeis4.)