A301909 Number of 5Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

16, 1, 16, 10, 12, 92, 320, 1588, 7234, 34477, 171770, 861562, 4318341, 21575848, 107657594, 537357962, 2682516710, 13395048430, 66897233633, 334110946467, 1668703731020, 8334274683849, 41625156594335, 207894886362394

Offset

1,1

Comments

Row 5 of A301906.

Links

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

Example

Some solutions for n=5
..0..1..0..1..0. .0..1..1..0..1. .0..1..1..1..1. .0..1..1..0..1
..0..1..0..1..0. .1..1..1..0..0. .1..1..0..1..1. .1..1..1..0..1
..0..1..0..1..0. .0..1..0..0..0. .1..1..0..1..1. .0..1..1..0..1
..0..1..0..1..0. .1..1..1..0..0. .1..1..0..1..1. .0..1..1..0..0
..0..1..0..1..0. .1..1..0..0..1. .1..1..1..1..0. .1..1..0..0..1

Crossrefs

Cf. A301906.

Sequence in context: A040270 A303327 A070539 * A070583 A133821 A002651

Adjacent sequences: A301906 A301907 A301908 * A301910 A301911 A301912

Keyword

nonn

Author

R. H. Hardin, Mar 28 2018

Status

approved