login
A317216
Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
0
0, 7, 133, 11378, 2762836, 2106680104, 4981964443017, 36636237693414092, 836922031617540197099
OFFSET
1,2
COMMENTS
Diagonal of A317222.
EXAMPLE
Some solutions for n=5
..0..0..1..1..0. .0..0..0..0..0. .0..0..1..0..0. .0..0..1..0..0
..0..1..1..1..0. .0..1..1..0..1. .0..1..1..1..0. .0..1..1..1..0
..0..0..1..0..1. .1..0..1..1..1. .0..1..1..0..1. .0..1..1..1..1
..1..0..0..1..0. .0..0..0..0..1. .0..1..1..1..1. .1..1..0..1..0
..0..1..0..1..1. .0..1..0..0..1. .1..0..0..1..0. .0..1..0..1..1
CROSSREFS
Cf. A317222.
Sequence in context: A251577 A082164 A229464 * A119670 A003374 A001533
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 23 2018
STATUS
approved