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A317148 Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 1
4, 14, 36, 102, 389, 1251, 4091, 13931, 46536, 155280, 521208, 1746936, 5849787, 19606077, 65709643, 220178291, 737853898, 2472724886, 8286395276, 27769017024, 93059002391, 311855992599, 1045081241871, 3502246009797, 11736618574344 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A317153.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +5*a(n-2) +10*a(n-3) -22*a(n-4) -56*a(n-5) -48*a(n-6) +100*a(n-7) +180*a(n-8) +100*a(n-9) -158*a(n-10) -172*a(n-11) -21*a(n-12) +38*a(n-13) -33*a(n-14) -36*a(n-15) for n>16

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317153.

Sequence in context: A332834 A128758 A258343 * A027166 A126943 A209399

Adjacent sequences:  A317145 A317146 A317147 * A317149 A317150 A317151

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 22 2018

STATUS

approved

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Last modified November 25 20:42 EST 2020. Contains 338627 sequences. (Running on oeis4.)