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A299302
Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
0
0, 4, 56, 1024, 55390, 6525374, 1227812226, 723886147451, 1084184652392138
OFFSET
1,2
COMMENTS
Diagonal of A299307.
EXAMPLE
Some solutions for n=5
..0..0..1..1..0. .0..0..1..0..0. .0..0..1..1..0. .0..0..1..0..1
..0..1..0..0..0. .1..0..0..1..1. .0..0..1..0..1. .1..1..1..1..0
..1..1..0..1..0. .1..0..0..0..0. .0..0..1..0..1. .1..1..1..1..0
..0..1..0..1..0. .0..0..0..1..0. .0..0..1..0..0. .1..1..0..1..1
..0..0..1..0..1. .1..1..0..0..1. .0..0..1..1..1. .0..0..1..0..1
CROSSREFS
Cf. A299307.
Sequence in context: A326289 A369534 A078533 * A327199 A358886 A371678
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 06 2018
STATUS
approved