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A299445
Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 1, 21, 231, 211, 6326, 174794, 665961, 84553473, 4512663317
OFFSET
1,2
COMMENTS
Diagonal of A299451.
EXAMPLE
Some solutions for n=5
..0..0..0..1..1. .0..1..1..1..0. .0..1..1..1..0. .0..0..1..1..1
..1..1..0..0..0. .0..1..1..1..0. .1..0..1..0..1. .0..0..1..1..1
..0..0..0..0..0. .1..1..1..1..1. .1..1..1..1..1. .1..1..1..1..1
..0..0..0..1..1. .1..0..1..0..1. .1..0..1..1..0. .1..1..1..0..0
..1..1..0..0..0. .0..1..1..1..0. .0..1..1..0..1. .1..1..1..0..0
CROSSREFS
Cf. A299451.
Sequence in context: A364760 A142472 A360089 * A135049 A113384 A243663
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 10 2018
STATUS
approved