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A282587 Number of nX2 0..1 arrays with no 1 equal to more than two of its king-move neighbors, with the exception of exactly two elements. 1
0, 0, 4, 12, 52, 220, 916, 3700, 14752, 58156, 225304, 862968, 3270532, 12271368, 45656044, 168573708, 618154444, 2252870436, 8165066740, 29443594572, 105688111208, 377777628972, 1345153364048, 4772722041056, 16878641894756 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A282593.

LINKS

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

FORMULA

Empirical: a(n) = 9*a(n-1) -24*a(n-2) +15*a(n-3) -36*a(n-4) +195*a(n-5) -143*a(n-6) -6*a(n-7) -492*a(n-8) +488*a(n-9) +96*a(n-10) +384*a(n-11) -512*a(n-12)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A282593.

Sequence in context: A149412 A259274 A109499 * A188230 A124006 A215524

Adjacent sequences:  A282584 A282585 A282586 * A282588 A282589 A282590

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 19 2017

STATUS

approved

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Last modified February 19 18:31 EST 2018. Contains 299356 sequences. (Running on oeis4.)