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A305584 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 7 or 8 king-move adjacent elements, with upper left element zero. 1
32, 13, 33, 102, 327, 1897, 8182, 33142, 152197, 674090, 2919193, 12923734, 57045467, 250441014, 1103213496, 4860506415, 21390637972, 94180079216, 414722020105, 1825861346649, 8038923220583, 35395372782451, 155840684210310 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A305586.

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) +33*a(n-3) -14*a(n-4) -54*a(n-5) -238*a(n-6) +86*a(n-7) +54*a(n-8) +467*a(n-9) -144*a(n-10) -48*a(n-11) -378*a(n-12) +144*a(n-13) +324*a(n-15) for n>20

EXAMPLE

Some solutions for n=5

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

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

CROSSREFS

Cf. A305586.

Sequence in context: A070629 A304228 A305038 * A316691 A275470 A162884

Adjacent sequences:  A305581 A305582 A305583 * A305585 A305586 A305587

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 05 2018

STATUS

approved

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Last modified October 27 09:08 EDT 2020. Contains 338035 sequences. (Running on oeis4.)