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A316372 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 13, 418, 16817, 1396959, 294007902, 118878261056, 97754857507717 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A316376.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316376.

Sequence in context: A048558 A219571 A304545 * A306130 A317267 A219366

Adjacent sequences:  A316369 A316370 A316371 * A316373 A316374 A316375

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 30 2018

STATUS

approved

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Last modified July 1 07:04 EDT 2022. Contains 354952 sequences. (Running on oeis4.)