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A316178 Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero. 1
4, 30, 134, 601, 2665, 11915, 53134, 237241, 1058821, 4726432, 21096932, 94170565, 420346821, 1876297370, 8375198688, 37384256688, 166871556228, 744862153097, 3324830353450, 14840996988230, 66245542638609, 295699266565050 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A316183.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +8*a(n-2) -4*a(n-3) -11*a(n-4) -a(n-5) -13*a(n-7) +2*a(n-8) -a(n-9) -a(n-10) -a(n-11) for n>12

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316183.

Sequence in context: A130424 A005715 A281950 * A305764 A317113 A123351

Adjacent sequences:  A316175 A316176 A316177 * A316179 A316180 A316181

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 25 2018

STATUS

approved

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Last modified April 19 20:04 EDT 2019. Contains 322291 sequences. (Running on oeis4.)