A301954 Number of 5Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

0, 34, 342, 7326, 120815, 2406169, 45013365, 854043977, 16129710295, 305221439281, 5771629701788, 109164158236088, 2064580944616050, 39047423296702605, 738499892840155074, 13967193695049173564

Offset: 1

Author

R. H. Hardin, Mar 29 2018

Keywords

• nonn

Comments

Row 5 of A301951.

Examples

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

Links

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

Crossrefs

Cf. A301951.