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A299075
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.
0
1, 8, 163, 8245, 1055999, 325878090, 250915355467, 482492338693115, 2293605474526180949
OFFSET
1,2
COMMENTS
Diagonal of A299081.
EXAMPLE
Some solutions for n=4
..0..1..0..1. .0..1..1..0. .0..0..0..0. .0..1..0..1. .0..0..0..0
..0..1..1..1. .1..1..1..1. .1..1..1..1. .0..0..0..1. .1..0..0..1
..0..1..1..1. .1..1..1..1. .0..1..1..0. .0..0..0..1. .0..0..0..0
..0..1..0..1. .0..1..1..0. .1..1..1..1. .0..1..0..1. .1..1..1..1
CROSSREFS
Cf. A299081.
Sequence in context: A025606 A224899 A281830 * A299840 A353777 A230916
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 02 2018
STATUS
approved