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A295600 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2, 3 or 4 1's. 0
2, 8, 83, 2305, 201602, 59562253, 59768294027, 195983446202018, 2042645631368981289, 66953404656552750563696, 6880370009924341556569346403, 2214730128261217537587945918885974 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A295606.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

..1..1..0..0. .0..0..0..1. .1..1..1..0. .1..0..0..0. .0..0..1..1

..1..1..0..1. .0..0..1..0. .1..1..1..1. .0..0..0..1. .1..1..1..1

..0..0..1..0. .0..0..0..0. .0..0..1..1. .0..0..0..0. .1..1..0..0

..0..1..0..0. .0..0..1..0. .1..0..1..1. .0..0..0..0. .0..0..1..0

CROSSREFS

Cf. A295606.

Sequence in context: A297566 A013175 A120820 * A336252 A276488 A295764

Adjacent sequences:  A295597 A295598 A295599 * A295601 A295602 A295603

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 24 2017

STATUS

approved

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Last modified October 25 17:13 EDT 2021. Contains 348255 sequences. (Running on oeis4.)