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A303717 Number of nX6 0..1 arrays with every element unequal to 0, 1 or 5 king-move adjacent elements, with upper left element zero. 1
13, 13, 24, 76, 169, 343, 741, 1618, 3451, 7390, 15924, 34201, 73387, 157681, 338754, 727483, 1562542, 3356380, 7209057, 15484111, 33258613, 71436250, 153437331, 329568094, 707879620, 1520453233, 3265779603, 7014566209, 15066579706 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A303719.

LINKS

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

FORMULA

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

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A303719.

Sequence in context: A072519 A060362 A003888 * A040157 A003889 A166545

Adjacent sequences:  A303714 A303715 A303716 * A303718 A303719 A303720

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 29 2018

STATUS

approved

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Last modified November 17 18:24 EST 2019. Contains 329241 sequences. (Running on oeis4.)