A301613 Number of nX6 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

5, 361, 12467, 421025, 14345706, 488491106, 16632517333, 566336198475, 19283659583317, 656605634861657, 22357328417975688, 761263743052450453, 25920919868772588676, 882603544282198427622, 30052522164474593294535

Offset: 1

Author

R. H. Hardin, Mar 24 2018

Keywords

• nonn

Comments

Column 6 of A301615.

Examples

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

Links

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

Crossrefs

Cf. A301615.