login
A300090
Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 5, 7, 56, 1301, 43848, 3273425, 616964357, 279529477217
OFFSET
1,2
COMMENTS
Diagonal of A300096.
EXAMPLE
Some solutions for n=5
..0..0..0..0..1. .0..0..1..0..1. .0..0..1..0..1. .0..0..1..0..0
..0..1..1..0..0. .1..0..1..1..1. .0..1..1..1..1. .0..1..0..1..0
..1..0..1..1..1. .0..0..0..1..0. .1..1..1..1..0. .0..1..0..1..0
..0..1..1..0..1. .1..0..0..0..0. .0..1..1..1..1. .0..1..0..1..0
..0..0..0..0..0. .1..1..0..1..0. .0..0..1..0..1. .0..0..1..0..0
CROSSREFS
Cf. A300096.
Sequence in context: A320112 A284380 A082714 * A324984 A106112 A260831
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2018
STATUS
approved