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A297900 Number of n X n 0..1 arrays with every element equal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero. 0
1, 4, 1, 37, 281, 257, 23911, 1367645, 10485521, 4553534006 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A297907.
LINKS
EXAMPLE
Some solutions for n=7
..0..0..1..0..0..1..0. .0..1..0..1..1..0..1. .0..0..1..1..0..0..0
..1..1..1..1..1..1..1. .0..1..0..1..1..0..1. .0..0..0..0..0..1..1
..0..0..1..0..0..1..0. .1..1..0..0..1..0..0. .1..1..1..1..0..1..1
..0..0..1..0..0..1..0. .1..1..0..0..1..1..0. .1..1..0..1..1..0..0
..0..1..1..1..0..1..1. .0..1..0..1..1..0..1. .0..0..0..0..1..0..0
..0..0..1..0..0..1..0. .1..1..0..0..1..0..0. .1..1..0..1..1..0..1
..1..0..0..1..0..0..1. .1..1..0..0..1..0..0. .1..1..0..1..1..0..1
CROSSREFS
Cf. A297907.
Sequence in context: A169656 A362589 A303987 * A363819 A298495 A193962
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 08 2018
STATUS
approved

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Last modified May 30 02:13 EDT 2024. Contains 372957 sequences. (Running on oeis4.)