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A299582
Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
0
0, 4, 1, 84, 2170, 38420, 12345692, 5383097328, 3979108348246
OFFSET
1,2
COMMENTS
Diagonal of A299588.
EXAMPLE
Some solutions for n=5
..0..0..0..1..1. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..1..1
..0..0..0..1..1. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..1..1
..0..0..0..1..1. .0..0..0..1..1. .0..0..0..0..0. .0..0..0..1..1
..0..0..1..1..0. .1..1..1..1..0. .0..0..1..0..0. .1..1..1..0..0
..1..1..1..1..0. .0..0..1..1..0. .1..1..1..1..1. .1..1..1..0..0
CROSSREFS
Cf. A299588.
Sequence in context: A100864 A295178 A255192 * A211341 A280620 A262405
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 13 2018
STATUS
approved