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A300638 Number of nX7 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
8, 223, 705, 3313, 17607, 124439, 865205, 6105466, 44264248, 319622847, 2311191759, 16797467849, 122107007666, 887949403002, 6461637480954, 47018596903063, 342127968993605, 2489544665981657, 18115122148301327 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A300639.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300639.

Sequence in context: A300349 A300434 A300768 * A301360 A267235 A230144

Adjacent sequences: A300635 A300636 A300637 * A300639 A300640 A300641

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 10 2018

STATUS

approved

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Last modified March 31 11:51 EDT 2023. Contains 361648 sequences. (Running on oeis4.)