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A303688 Number of nX6 0..1 arrays with every element unequal to 2, 3 or 4 king-move adjacent elements, with upper left element zero. 1
0, 209, 108, 1744, 2809, 19068, 55382, 273621, 934066, 4202604, 15472710, 66178236, 253206464, 1054639996, 4118641264, 16900720621, 66776102270, 271648054383, 1080722426035, 4373896909559, 17472759594897, 70501053021557 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A303690.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303690.

Sequence in context: A268091 A209300 A003740 * A080532 A153442 A159274

Adjacent sequences:  A303685 A303686 A303687 * A303689 A303690 A303691

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 28 2018

STATUS

approved

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Last modified December 8 18:37 EST 2019. Contains 329865 sequences. (Running on oeis4.)