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A317511
Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
1
1, 8, 255, 32256, 16198017, 32289056648, 255495837970145, 8025093993437265376, 1000586105494959749616796, 495218382735595839495210771842, 972919685981025490418238840100646750
OFFSET
1,2
COMMENTS
Diagonal of A317517.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..1..0. .0..0..0..1..0. .0..0..0..0..1. .0..0..0..0..1
..1..1..0..0..1. .1..0..0..0..1. .1..0..0..0..1. .0..0..0..1..0
..0..0..1..0..1. .0..0..1..0..1. .1..1..1..1..1. .1..1..1..1..0
..0..1..1..0..1. .1..1..0..1..0. .1..1..1..0..0. .0..1..0..1..1
CROSSREFS
Cf. A317517.
Sequence in context: A053717 A267250 A034674 * A300176 A372670 A291850
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 30 2018
STATUS
approved