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A304135
Number of n X n 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
0
1, 4, 5, 11, 39, 39, 48, 11067, 8405, 540, 15841950, 66160098, 1198599
OFFSET
1,2
COMMENTS
Diagonal of A304141.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..1..0..0..1. .0..0..0..1..0. .0..1..1..0..1
..0..0..0..0..0. .1..1..0..0..1. .0..0..0..1..1. .1..0..1..0..0
..0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0. .0..1..1..1..1
..0..0..0..0..0. .0..0..1..0..0. .0..0..0..1..0. .0..1..1..1..1
..1..1..1..1..1. .1..1..0..0..1. .1..1..1..0..1. .0..1..1..1..1
CROSSREFS
Cf. A304141.
Sequence in context: A352681 A109503 A304224 * A251240 A361529 A305041
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 07 2018
STATUS
approved