A317699 - OEIS

A317699

Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 4, 25, 1719, 468002, 508895558, 2157266427366, 35375750998532860, 2234441612008121460906, 543166694783264652942675685

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OFFSET

1,2

COMMENTS

Diagonal of A317703.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 04 2018

STATUS

approved