A301845 Number of 5Xn 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

16, 512, 4299, 48802, 496085, 5240684, 54948498, 577194574, 6070236888, 63855283956, 671950959732, 7071734560895, 74426242914307, 783303529316947, 8243938456863301, 86764009232555716, 913155201853131784

Offset: 1

Author

R. H. Hardin, Mar 27 2018

Keywords

• nonn

Comments

Row 5 of A301841.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 99

Crossrefs

Cf. A301841.

Formula

Empirical recurrence of order 99 (see link above)