login
A298178
Number of n X n 0..1 arrays with every element equal to 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
0, 1, 1, 3, 15, 53, 231, 1948, 15321, 153043, 2337091, 40632357, 844327333, 25573081565
OFFSET
1,4
COMMENTS
Diagonal of A298183.
EXAMPLE
Some solutions for n=7
..0..0..1..1..1..0..0. .0..0..0..0..0..1..1. .0..0..0..0..1..1..1
..0..0..1..1..1..0..0. .0..0..0..0..0..1..1. .0..0..0..0..1..1..1
..0..0..1..1..1..0..0. .1..1..1..1..0..0..0. .1..1..1..0..0..0..0
..1..1..1..1..1..0..0. .1..1..1..1..0..0..0. .1..1..1..0..0..0..0
..1..1..0..0..1..1..1. .0..0..0..1..1..1..1. .1..1..1..1..1..1..1
..1..1..0..0..1..1..1. .0..0..0..1..1..1..1. .0..0..1..1..1..1..1
..1..1..0..0..1..1..1. .0..0..0..1..1..1..1. .0..0..1..1..1..1..1
CROSSREFS
Cf. A298183.
Sequence in context: A212869 A371481 A332375 * A147618 A290764 A286986
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 14 2018
STATUS
approved