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A317066
Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
0, 7, 153, 16910, 6661787, 9795822463, 53838648326109, 1105073018086192119, 84717348485283814164745, 24257389810894253781874213074
OFFSET
1,2
COMMENTS
Diagonal of A317072.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..1..0. .0..0..0..1..0
..0..1..0..0..1. .0..1..0..1..0. .1..0..0..0..0. .0..1..0..1..0
..1..0..1..0..0. .1..0..1..1..1. .1..0..1..1..0. .1..1..1..1..1
..1..1..1..1..0. .0..1..0..1..0. .0..0..1..1..1. .0..1..0..1..0
..1..0..0..1..1. .0..0..1..0..0. .1..0..0..1..0. .1..0..0..1..1
CROSSREFS
Cf. A317072.
Sequence in context: A305686 A356739 A006761 * A213798 A219102 A219981
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 20 2018
STATUS
approved