A301888 Number of 5Xn 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

16, 89, 289, 673, 1961, 8829, 33853, 122356, 439781, 1684392, 6453460, 24681438, 94429284, 362493684, 1391521355, 5344223744, 20538410002, 78964625841, 303575679612, 1167193062685, 4488137643340, 17259059593492, 66369856821954

Offset

1,1

Comments

Row 5 of A301884.

Links

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

Example

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

Crossrefs

Cf. A301884.

Sequence in context: A301794 A301967 A208640 * A302084 A229399 A269078

Adjacent sequences: A301885 A301886 A301887 * A301889 A301890 A301891

Keyword

nonn

Author

R. H. Hardin, Mar 28 2018

Status

approved