login
A299808
Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 12, 476, 11460, 1881856, 1009387819, 1201130067486, 5391490611757566
OFFSET
1,2
COMMENTS
Diagonal of A299814.
EXAMPLE
Some solutions for n=5
..0..0..0..1..0. .0..0..1..1..0. .0..0..0..0..1. .0..0..0..1..1
..0..0..0..1..0. .0..0..1..1..0. .0..0..0..1..0. .0..0..0..1..1
..0..0..0..0..0. .1..1..1..1..1. .1..1..1..1..1. .0..0..0..1..1
..1..1..1..0..0. .1..1..1..0..1. .1..1..1..1..1. .1..0..1..1..1
..1..1..1..0..0. .1..1..1..0..1. .1..1..1..1..1. .0..1..1..1..0
CROSSREFS
Cf. A299814.
Sequence in context: A360498 A291098 A009506 * A085116 A104129 A144631
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 19 2018
STATUS
approved