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A304267 Number of nX5 0..1 arrays with every element unequal to 0, 1, 5 or 8 king-move adjacent elements, with upper left element zero. 1
8, 7, 19, 50, 146, 404, 1074, 2990, 8316, 22660, 62314, 172244, 473150, 1300260, 3582364, 9857308, 27108012, 74607826, 205320218, 564864078, 1554286696, 4277060278, 11768341874, 32381151240, 89101629960, 245170898378 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A304270.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-2) +10*a(n-3) +4*a(n-4) -2*a(n-5) -12*a(n-6) -5*a(n-7) -4*a(n-8) +4*a(n-9) for n>10

EXAMPLE

Some solutions for n=5

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

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

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

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

..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0

CROSSREFS

Cf. A304270.

Sequence in context: A075573 A317706 A302677 * A166138 A348673 A302512

Adjacent sequences:  A304264 A304265 A304266 * A304268 A304269 A304270

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 09 2018

STATUS

approved

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Last modified December 4 05:56 EST 2021. Contains 349470 sequences. (Running on oeis4.)