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A303724 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 3 king-move adjacent elements, with upper left element zero. 1
16, 120, 77, 133, 219, 345, 564, 974, 1715, 2992, 5222, 9175, 16164, 28488, 50193, 88452, 155956, 275011, 484934, 855114, 1507919, 2659158, 4689360, 8269543, 14583134, 25717084, 45351643, 79976894, 141037974, 248718277, 438610954 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A303727.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) -a(n-4) -a(n-6) -a(n-7) +2*a(n-8) for n>12

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303727.

Sequence in context: A210428 A283037 A093740 * A305227 A304772 A316515

Adjacent sequences:  A303721 A303722 A303723 * A303725 A303726 A303727

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 29 2018

STATUS

approved

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Last modified September 25 06:22 EDT 2022. Contains 356959 sequences. (Running on oeis4.)