login
A300036
Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
0, 4, 113, 5663, 766231, 281861630, 262361247480, 630608329894023, 3923995292582316404
OFFSET
1,2
COMMENTS
Diagonal of A300040.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..1
..0..0..1..1..1. .1..1..1..0..1. .1..1..1..1..0. .0..1..0..0..1
..0..1..0..1..0. .1..0..0..1..1. .1..0..1..0..0. .1..0..1..0..1
..0..1..0..0..1. .1..0..0..1..0. .0..0..1..0..1. .1..0..1..1..0
..0..0..1..1..0. .1..1..1..0..0. .1..1..0..1..1. .1..1..0..0..0
CROSSREFS
Cf. A300040.
Sequence in context: A298331 A299394 A299222 * A199834 A194495 A260575
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 23 2018
STATUS
approved