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A305583 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 7 or 8 king-move adjacent elements, with upper left element zero. 1
16, 8, 19, 38, 76, 327, 967, 2641, 8578, 26437, 78868, 243583, 747553, 2276209, 6972325, 21347977, 65257777, 199664890, 610944133, 1868823559, 5717250070, 17491334971, 53510023900, 163701580426, 500812768156, 1532124309511 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A305586.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-2) +12*a(n-3) -9*a(n-5) -27*a(n-6) for n>10

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305586.

Sequence in context: A304227 A305037 A083536 * A316690 A258160 A040243

Adjacent sequences:  A305580 A305581 A305582 * A305584 A305585 A305586

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 05 2018

STATUS

approved

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Last modified September 19 21:42 EDT 2020. Contains 337184 sequences. (Running on oeis4.)