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A298233 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. 0
1, 5, 22, 1156, 107163, 45356726, 67668568376, 329969482748272, 5435912602052623963 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A298240.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..0..0. .0..0..0..1..1. .0..0..0..1..0. .0..1..0..0..0
..1..1..1..0..1. .1..0..1..0..1. .0..1..0..0..0. .1..1..1..0..0
..1..0..1..1..1. .1..1..0..1..0. .1..1..1..1..0. .0..0..1..1..1
..0..0..1..0..0. .0..0..0..0..1. .1..1..0..1..1. .0..1..0..0..1
..0..0..0..0..1. .0..1..0..1..1. .1..0..0..1..1. .1..1..1..0..0
CROSSREFS
Cf. A298240.
Sequence in context: A300031 A271678 A002069 * A215742 A357948 A367721
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2018
STATUS
approved

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Last modified March 1 15:55 EST 2024. Contains 370442 sequences. (Running on oeis4.)