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A305518 Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. 1
4, 32, 219, 1482, 10082, 68603, 466858, 3177374, 21625010, 147179480, 1001703378, 6817595812, 46400585436, 315802597912, 2149353979808, 14628513490716, 99561733170096, 677617635277016, 4611868889066792, 31388401871930176 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A305523.

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) +8*a(n-2) -10*a(n-3) -44*a(n-4) -30*a(n-5) for n>6

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305523.

Sequence in context: A133642 A098981 A120917 * A298965 A316955 A299735

Adjacent sequences:  A305515 A305516 A305517 * A305519 A305520 A305521

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 04 2018

STATUS

approved

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Last modified December 12 09:36 EST 2019. Contains 329953 sequences. (Running on oeis4.)