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A305016
Number of n X n 0..1 arrays with every element unequal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
0
0, 3, 14, 769, 101178, 42306830, 51145342760, 181720148100909, 1885049686514472003
OFFSET
1,2
COMMENTS
Diagonal of A305022.
EXAMPLE
Some solutions for n=5
..0..1..1..0..1. .0..1..0..0..1. .0..1..0..1..0. .0..1..0..0..1
..1..0..0..0..0. .1..0..0..1..0. .1..0..1..1..0. .1..1..1..1..0
..1..0..0..1..1. .1..1..1..0..1. .1..0..1..0..1. .0..1..1..1..0
..1..0..1..1..0. .0..1..1..0..0. .0..0..0..1..0. .0..0..0..1..1
..1..0..1..0..1. .1..0..0..1..1. .1..1..0..1..0. .1..1..0..0..0
CROSSREFS
Cf. A305022.
Sequence in context: A088334 A304059 A305453 * A316682 A268158 A367674
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 23 2018
STATUS
approved