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A304012
Number of n X n 0..1 arrays with every element unequal to 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.
0
0, 7, 38, 370, 5162, 99733, 2820436, 106817959, 5516875986, 403632644584
OFFSET
1,2
COMMENTS
Diagonal of A304019.
EXAMPLE
Some solutions for n=5
..0..0..0..1..1. .0..0..0..1..1. .0..1..0..0..1. .0..0..0..0..1
..0..1..1..0..0. .1..0..1..1..0. .0..0..0..1..1. .1..0..0..1..1
..1..1..0..0..0. .1..1..1..1..1. .1..0..0..0..1. .0..0..0..0..1
..0..1..1..0..1. .1..0..1..0..0. .0..0..1..1..0. .0..0..0..1..1
..1..1..0..0..0. .0..0..0..0..1. .1..1..1..0..0. .0..1..0..1..0
CROSSREFS
Cf. A304019.
Sequence in context: A354340 A229126 A158576 * A329528 A215441 A373539
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 04 2018
STATUS
approved