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A297518 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s. 1
13, 529, 5079, 85843, 1671315, 25184119, 424461759, 7287075949, 119542912709, 2002902791701, 33647370739993, 560607123996981, 9377445295667227, 156927250471302049, 2622103739185322411, 43845148158283369263 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A297519.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A297519.

Sequence in context: A174564 A300525 A295942 * A281055 A030256 A023332

Adjacent sequences: A297515 A297516 A297517 * A297519 A297520 A297521

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2017

STATUS

approved

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Last modified December 8 20:46 EST 2022. Contains 358698 sequences. (Running on oeis4.)