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A299188
Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
0
1, 4, 3, 80, 1539, 11459, 848789, 122310309, 6602925250, 2215354712154
OFFSET
1,2
COMMENTS
Diagonal of A299194.
EXAMPLE
Some solutions for n=5
..0..0..1..0..1. .0..0..1..1..0. .0..1..0..0..1. .0..0..1..0..0
..0..0..0..0..0. .1..1..1..1..1. .1..0..0..1..0. .0..0..1..0..0
..1..0..0..0..0. .1..1..1..1..1. .1..1..1..1..1. .1..1..0..1..1
..0..0..0..1..1. .0..0..1..0..0. .1..1..1..1..1. .0..0..1..0..0
..1..0..0..0..0. .1..1..1..1..1. .0..1..1..0..0. .0..0..1..0..0
CROSSREFS
Cf. A299194.
Sequence in context: A299389 A220556 A371687 * A300026 A349589 A362736
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 04 2018
STATUS
approved