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A303316 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
8, 6, 11, 36, 50, 128, 439, 1085, 2431, 6452, 17455, 43514, 108524, 281615, 726261, 1839731, 4685152, 12025643, 30754258, 78396104, 200278695, 512290781, 1308785863, 3342222476, 8540451095, 21826102586, 55761123412, 142456533311 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A303314.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-2) +5*a(n-3) +9*a(n-4) -3*a(n-5) -7*a(n-6) -2*a(n-7) for n>11

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A303314.

Sequence in context: A053744 A265118 A034085 * A340518 A173435 A184728

Adjacent sequences:  A303313 A303314 A303315 * A303317 A303318 A303319

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 21 2018

STATUS

approved

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Last modified September 23 20:42 EDT 2021. Contains 347617 sequences. (Running on oeis4.)