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A297714 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1's. 0
1, 10, 145, 4212, 512354, 183324631, 154327332017, 362685079640486, 2553300741336194602 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A297720.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A297720.

Sequence in context: A305969 A081697 A134526 * A055761 A295524 A095889

Adjacent sequences:  A297711 A297712 A297713 * A297715 A297716 A297717

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2018

STATUS

approved

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Last modified September 28 06:57 EDT 2021. Contains 347703 sequences. (Running on oeis4.)