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A303244 Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
8, 3, 55, 10, 255, 149, 1676, 3307, 18505, 65498, 290437, 1198777, 5087180, 21490967, 90839013, 384340750, 1625471539, 6876513885, 29091034026, 123070552817, 520674602677, 2202800218342, 9319394664521, 39427619066391, 166806435914930 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A303242.

LINKS

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

R. H. Hardin, Empirical recurrence of order 67

FORMULA

Empirical recurrence of order 67 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A303242.

Sequence in context: A256046 A197245 A302462 * A038281 A302370 A303086

Adjacent sequences:  A303241 A303242 A303243 * A303245 A303246 A303247

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 20 2018

STATUS

approved

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Last modified October 26 20:05 EDT 2021. Contains 348269 sequences. (Running on oeis4.)