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A316240 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 23, 835, 99193, 32646098, 30308496367, 76005434762214, 524741664012440114 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A316244.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316244.

Sequence in context: A219464 A107765 A304413 * A305948 A317211 A145514

Adjacent sequences:  A316237 A316238 A316239 * A316241 A316242 A316243

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 27 2018

STATUS

approved

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Last modified May 24 19:38 EDT 2022. Contains 354043 sequences. (Running on oeis4.)