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A320408 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
64, 700, 7049, 92578, 1353623, 19677729, 282206549, 4085687781, 58997871413, 854291464126, 12364136018320, 178956311530396, 2590922938391319, 37511252836334859, 543116212765934101, 7863666564278921803 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A320409.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A320409.

Sequence in context: A187620 A119287 A318023 * A223963 A303726 A305229

Adjacent sequences: A320405 A320406 A320407 * A320409 A320410 A320411

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 12 2018

STATUS

approved

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Last modified February 8 04:10 EST 2023. Contains 360134 sequences. (Running on oeis4.)