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A317560 Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 1
4, 32, 228, 1619, 11510, 81814, 581541, 4133710, 29383111, 208860377, 1484616765, 10552920182, 75012037028, 533198924617, 3790072965570, 26940513998485, 191497974085549, 1361201723303423, 9675664405327884, 68776346725332218 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A317565.

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) +11*a(n-2) -11*a(n-3) -72*a(n-4) -54*a(n-5) for n>6

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317565.

Sequence in context: A299656 A125823 A320366 * A302742 A300210 A302736

Adjacent sequences:  A317557 A317558 A317559 * A317561 A317562 A317563

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 31 2018

STATUS

approved

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Last modified March 29 15:16 EDT 2020. Contains 333107 sequences. (Running on oeis4.)