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A297756 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1's. 0
1, 2, 52, 1181, 109228, 59707529, 108229776807, 486950815286291, 7321785704464787533, 424569942925543143564742 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A297762.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A297762.

Sequence in context: A123803 A284767 A101930 * A174779 A215744 A099882

Adjacent sequences:  A297753 A297754 A297755 * A297757 A297758 A297759

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2018

STATUS

approved

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Last modified January 21 22:08 EST 2022. Contains 350480 sequences. (Running on oeis4.)