A302513 Number of nX6 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

13, 13, 52, 80, 199, 458, 1088, 2651, 6257, 14765, 35292, 84261, 200040, 475278, 1132373, 2696179, 6411133, 15251746, 36304757, 86394322, 205538228, 489069395, 1163851093, 2769397039, 6589505584, 15679835445, 37311095302, 88781699786

Offset: 1

Author

R. H. Hardin, Apr 09 2018

Keywords

• nonn

Comments

Column 6 of A302515.

Examples

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

Links

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

Crossrefs

Cf. A302515.

Formula

Empirical: a(n) = a(n-1) +6*a(n-3) +5*a(n-4) +3*a(n-5) -8*a(n-6) -6*a(n-7) -3*a(n-8) for n>12