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A295199 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1's. 0
1, 2, 8, 42, 438, 8241, 279663, 17574795, 2023191364, 425872679440, 164093026377725, 115549694765467808, 148496731427890025827 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A295205.
LINKS
EXAMPLE
Some solutions for n=6
..0..0..0..0..0..0. .1..1..0..1..1..1. .0..1..1..1..1..1. .0..1..1..1..0..0
..1..1..1..1..0..0. .1..1..1..1..0..1. .0..1..0..0..0..1. .0..1..0..1..0..0
..1..0..0..1..1..0. .0..1..0..0..0..1. .1..1..0..1..1..1. .1..1..0..1..1..0
..1..0..0..0..1..0. .0..1..1..0..0..1. .1..0..1..1..0..0. .1..0..0..0..1..1
..1..1..1..1..1..1. .0..0..1..1..1..1. .1..1..1..0..0..0. .1..1..1..1..0..1
..0..0..0..0..1..1. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..1..1..1
CROSSREFS
Cf. A295205.
Sequence in context: A191994 A153524 A153552 * A191479 A197935 A267619
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 16 2017
STATUS
approved

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