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.

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

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