login
A316442
Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
0, 7, 57, 946, 43568, 3624515, 621643922, 235652502418, 182371905958510
OFFSET
1,2
COMMENTS
Diagonal of A316448.
EXAMPLE
Some solutions for n=5
..0..0..0..1..0. .0..1..0..0..1. .0..1..1..1..0. .0..1..1..0..1
..1..0..1..1..1. .0..0..0..0..0. .0..0..1..0..0. .1..0..1..0..0
..0..0..1..0..1. .0..1..1..0..0. .1..1..1..1..1. .1..0..0..0..0
..0..1..1..1..1. .0..0..1..0..1. .1..0..1..1..0. .1..1..1..0..1
..1..1..1..0..1. .1..1..1..1..1. .1..0..0..1..1. .0..1..1..0..0
CROSSREFS
Cf. A316448.
Sequence in context: A349116 A337556 A337022 * A289876 A290847 A324420
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 03 2018
STATUS
approved