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A303097 Number of nX3 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
1, 15, 77, 486, 2869, 17229, 102952, 616065, 3685099, 22045482, 131879323, 788928513, 4719516650, 28233043741, 168895389127, 1010364108842, 6044188782411, 36157478162593, 216300858973502, 1293952564919109 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A303102.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +9*a(n-2) -14*a(n-3) -28*a(n-4) -6*a(n-5) +32*a(n-6) +10*a(n-7) -2*a(n-8) +32*a(n-9) -32*a(n-11)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303102.

Sequence in context: A205609 A257925 A205433 * A128272 A180579 A081591

Adjacent sequences:  A303094 A303095 A303096 * A303098 A303099 A303100

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 18 2018

STATUS

approved

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Last modified October 26 21:33 EDT 2021. Contains 348269 sequences. (Running on oeis4.)