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A297952 Number of n X n 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero. 0
0, 3, 15, 78, 681, 11283, 483929, 22145365, 2092206702, 397080534452 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A297959.
LINKS
EXAMPLE
Some solutions for n=6
..0..1..1..0..0..1. .0..1..1..1..1..0. .0..1..0..1..0..1. .0..1..0..0..1..0
..1..0..0..1..1..0. .0..0..1..1..0..0. .0..1..1..0..1..1. .0..0..1..1..0..1
..0..0..0..1..1..0. .0..0..0..0..0..0. .1..1..0..1..0..0. .0..0..1..1..0..0
..1..1..1..0..1..1. .1..0..1..1..0..1. .1..1..0..1..1..1. .1..0..1..1..0..0
..0..1..1..1..0..0. .0..1..1..1..1..0. .0..1..1..0..1..0. .0..1..0..1..0..1
..0..1..0..0..1..0. .1..0..0..0..0..1. .1..0..1..0..1..0. .1..1..0..1..1..1
CROSSREFS
Cf. A297959.
Sequence in context: A125700 A227954 A104530 * A298771 A298576 A299568
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 09 2018
STATUS
approved

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Last modified March 28 16:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)