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A301401 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
1, 8, 252, 31012, 14905344, 27990353344, 205353183605152, 5886041167193603328, 659134453175183361984192, 288372301975051917749449831520, 492903495313227230995120900845724672 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A301407.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..1..1. .0..0..0..0..1. .0..0..0..1..1. .0..0..0..0..1
..1..1..0..0..0. .0..1..1..0..1. .0..1..1..1..1. .1..1..0..1..1
..1..0..0..0..1. .0..0..1..1..1. .0..1..1..0..1. .0..1..0..0..1
..0..1..0..0..0. .1..0..1..0..1. .1..1..1..0..0. .0..1..0..1..1
CROSSREFS
Cf. A301407.
Sequence in context: A138323 A214817 A303415 * A162132 A297051 A213412
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 20 2018
STATUS
approved

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Last modified June 19 03:10 EDT 2024. Contains 373492 sequences. (Running on oeis4.)