A326100 Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

4, 29, 161, 929, 5383, 31236, 181227, 1051456, 6100399, 35393679, 205349281, 1191408438, 6912388772, 40104734047, 232682180647, 1349990181408, 7832458355125, 45442851903417, 263653210203742, 1529679858088141

Offset

1,1

Comments

Column 3 of A326105.

Links

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

Formula

Empirical: a(n) = 5*a(n-1) +5*a(n-2) -2*a(n-3) -3*a(n-6) -2*a(n-7) -a(n-8) -a(n-9)

Example

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

Crossrefs

Cf. A326105.

Sequence in context: A302960 A273300 A300467 * A273209 A273271 A200069

Adjacent sequences: A326097 A326098 A326099 * A326101 A326102 A326103

Keyword

nonn

Author

R. H. Hardin, Jun 06 2019

Status

approved