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A297726 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s. 1
1, 2735, 110551, 2139403, 91994155, 4238895126, 154327332017, 5699564719228, 225335188630385, 8767500946143576, 335583072729414460, 12937974222045436776, 500589141612794916455, 19317070336607603879897 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A297720.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

CROSSREFS

Cf. A297720.

Sequence in context: A251989 A251985 A297512 * A122473 A253994 A253987

Adjacent sequences:  A297723 A297724 A297725 * A297727 A297728 A297729

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2018

STATUS

approved

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Last modified August 25 05:06 EDT 2019. Contains 326318 sequences. (Running on oeis4.)