A300462 Number of nX5 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 9, 22, 142, 1146, 7456, 55663, 400028, 2906875, 21162204, 153677233, 1117612488, 8123629685, 59057261422, 429317113075, 3120977422852, 22688267741133, 164934718709179, 1199012026918226, 8716348960310287, 63364478025520501

Offset: 1

Author

R. H. Hardin, Mar 06 2018

Keywords

• nonn

Comments

Column 5 of A300465.

Examples

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

Links

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

Crossrefs

Cf. A300465.