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A317424
Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 5, 14, 97, 1097, 9116, 135880, 3452903, 95798175, 3910778957, 254073667410
OFFSET
1,2
COMMENTS
Diagonal of A317429.
EXAMPLE
Some solutions for n=5
..0..1..1..1..0. .0..0..0..1..0. .0..0..1..1..1. .0..0..1..0..0
..1..1..1..1..1. .0..0..0..0..0. .0..1..1..1..1. .0..0..0..0..0
..1..1..1..1..1. .0..0..0..0..0. .1..1..1..1..1. .0..1..1..0..1
..1..0..1..1..1. .0..0..0..0..1. .1..1..1..1..0. .0..0..1..0..0
..1..1..1..1..1. .1..0..0..0..0. .1..1..1..1..1. .0..0..0..0..0
CROSSREFS
Cf. A317429.
Sequence in context: A348777 A024167 A316421 * A077262 A184439 A370006
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 27 2018
STATUS
approved