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A301607 Number of nX7 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. 1
1, 21, 55, 755, 6393, 60841, 591585, 5880829, 58383932, 585233819, 5854941545, 58759934077, 589360075403, 5914609427757, 59355963113549, 595731234612875, 5979121155775603, 60011713256358774, 602331412174313879 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A301608.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301608.

Sequence in context: A264104 A236694 A292368 * A145719 A031963 A067727

Adjacent sequences:  A301604 A301605 A301606 * A301608 A301609 A301610

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 24 2018

STATUS

approved

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Last modified October 19 16:17 EDT 2019. Contains 328223 sequences. (Running on oeis4.)