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A299800 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 7, 20, 174, 7013, 388453, 61726046, 23457257837, 21977588184244 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A299806.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..1..0. .0..1..1..1..0. .0..0..0..0..1. .0..0..0..0..0
..0..0..0..0..0. .1..0..0..0..0. .1..1..1..1..1. .1..1..1..1..1
..0..0..0..0..0. .1..0..0..0..0. .0..1..1..1..1. .0..1..1..1..0
..0..0..0..0..0. .0..0..0..0..0. .0..1..1..1..1. .0..1..1..1..0
..0..1..1..1..0. .1..1..1..1..0. .1..0..0..0..1. .1..0..0..0..1
CROSSREFS
Cf. A299806.
Sequence in context: A009372 A051102 A299009 * A299676 A300308 A344849
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 19 2018
STATUS
approved

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Last modified July 12 11:28 EDT 2024. Contains 374245 sequences. (Running on oeis4.)