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A316240
Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 23, 835, 99193, 32646098, 30308496367, 76005434762214, 524741664012440114
OFFSET
1,2
COMMENTS
Diagonal of A316244.
EXAMPLE
Some solutions for n=5
..0..1..0..1..1. .0..1..1..1..1. .0..1..0..0..1. .0..1..0..1..1
..1..0..0..1..1. .1..0..0..0..0. .0..1..0..0..1. .1..0..1..0..0
..0..0..0..0..0. .0..0..1..0..0. .1..1..0..0..1. .0..1..1..0..0
..0..1..1..1..0. .1..1..1..1..1. .0..1..1..0..0. .0..1..1..0..0
..1..0..1..0..1. .1..1..1..1..1. .1..0..0..1..1. .0..1..0..1..1
CROSSREFS
Cf. A316244.
Sequence in context: A219464 A107765 A304413 * A305948 A317211 A145514
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 27 2018
STATUS
approved