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A317211 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 23, 959, 127358, 53479785, 66735041323, 247944910114486, 2724578446333546605 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A317215.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317215.

Sequence in context: A304413 A316240 A305948 * A145514 A305665 A319145

Adjacent sequences:  A317208 A317209 A317210 * A317212 A317213 A317214

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 23 2018

STATUS

approved

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Last modified July 4 23:17 EDT 2022. Contains 355086 sequences. (Running on oeis4.)