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A316999 Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero. 1
4, 30, 162, 894, 4905, 26952, 148138, 814090, 4474116, 24589282, 135138808, 742704801, 4081805962, 22433046900, 123288989733, 677579579346, 3723885463368, 20465969746469, 112478195239041, 618164912416022 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A317004.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +3*a(n-2) +7*a(n-3) -48*a(n-4) +5*a(n-5) +10*a(n-6) +2*a(n-7) -19*a(n-8) -15*a(n-9) -6*a(n-10) -a(n-11) for n>12

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317004.

Sequence in context: A317113 A123351 A305525 * A217213 A119697 A316817

Adjacent sequences:  A316996 A316997 A316998 * A317000 A317001 A317002

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 18 2018

STATUS

approved

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Last modified October 15 18:54 EDT 2021. Contains 348034 sequences. (Running on oeis4.)