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A316803 Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 1
4, 32, 247, 1905, 14711, 113606, 877309, 6774916, 52318510, 404023677, 3120026371, 24094044759, 186063489168, 1436853892633, 11095938907760, 85687111874080, 661708865050287, 5109970595456477, 39461160134896235, 304734270012530218 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A316808.

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) -3*a(n-2) +7*a(n-3) -3*a(n-4)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316808.

Sequence in context: A331334 A301779 A147551 * A299649 A317520 A300203

Adjacent sequences:  A316800 A316801 A316802 * A316804 A316805 A316806

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 14 2018

STATUS

approved

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Last modified September 18 18:41 EDT 2021. Contains 347533 sequences. (Running on oeis4.)