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A298764
Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero.
0
0, 4, 57, 957, 23932, 942727, 53950338, 4698205702, 620363350692
OFFSET
1,2
COMMENTS
Diagonal of A298770.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..1..1..1..0. .0..0..0..0..0. .0..1..0..0..0
..1..1..1..1..1. .0..1..1..1..0. .0..1..1..1..0. .0..1..0..0..0
..1..1..1..1..1. .0..1..1..1..0. .0..1..1..1..0. .0..1..0..0..0
..1..1..1..1..1. .0..0..0..0..0. .0..1..1..1..0. .0..1..1..1..1
..1..1..1..1..1. .1..1..1..1..1. .0..0..0..0..0. .0..0..0..0..1
CROSSREFS
Cf. A298770.
Sequence in context: A156873 A320977 A071540 * A299562 A299459 A300103
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2018
STATUS
approved