A317452 - OEIS

A317452

Number of n X n 0..1 arrays with every element unequal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 3, 17, 72, 4364, 165890, 14872138, 5301169782, 6077202952491

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OFFSET

1,2

COMMENTS

Diagonal of A317458.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 28 2018

STATUS

approved