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

Author

R. H. Hardin, Jun 06 2019

Keywords

• nonn

Comments

Column 3 of A326105.

Examples

			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
		

Links

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

Crossrefs

Cf. A326105.

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)