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A300373 Number of n X n 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 3, 4, 26, 389, 8839, 481311, 47968011, 9905247305, 3987964431282, 3056200820361709 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A300380.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..1..1. .0..0..1..0..0. .0..1..0..0..1. .0..1..1..0..0
..1..1..1..1..0. .0..1..1..0..1. .1..1..0..1..1. .1..0..1..0..1
..0..0..0..0..0. .0..0..1..0..0. .1..0..1..0..0. .1..1..1..0..0
..0..1..1..1..1. .0..1..1..0..1. .0..0..1..0..1. .0..0..0..1..0
..1..1..0..1..0. .0..0..0..1..1. .0..1..1..1..1. .0..1..0..0..0
CROSSREFS
Cf. A300380.
Sequence in context: A302397 A151372 A258103 * A222112 A032832 A041021
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 04 2018
STATUS
approved

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)